stm32: Don't use %lu or %lx for formatting, use just %u or %x.

On this 32-bit arch there's no need to use the long version of the format
specifier.  It's only there to appease the compiler which checks the type
of the args passed to printf.  Removing the "l" saves a bit of code space.

ports/stm32/adc.c

@@ -310,7 +310,7 @@ STATIC void adc_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t
     pyb_obj_adc_t *self = self_in;
     mp_print_str(print, "<ADC on ");
     mp_obj_print_helper(print, self->pin_name, PRINT_STR);
-    mp_printf(print, " channel=%lu>", self->channel);
+    mp_printf(print, " channel=%u>", self->channel);
 }
 
 /// \classmethod \constructor(pin)

ports/stm32/extint.c

@@ -387,44 +387,44 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_1(extint_obj_swint_obj,  extint_obj_swint);
 /// Dump the values of the EXTI registers.
 STATIC mp_obj_t extint_regs(void) {
     #if defined(STM32L4)
-    printf("EXTI_IMR1   %08lx\n", EXTI->IMR1);
-    printf("EXTI_IMR2   %08lx\n", EXTI->IMR2);
-    printf("EXTI_EMR1   %08lx\n", EXTI->EMR1);
-    printf("EXTI_EMR2   %08lx\n", EXTI->EMR2);
-    printf("EXTI_RTSR1  %08lx\n", EXTI->RTSR1);
-    printf("EXTI_RTSR2  %08lx\n", EXTI->RTSR2);
-    printf("EXTI_FTSR1  %08lx\n", EXTI->FTSR1);
-    printf("EXTI_FTSR2  %08lx\n", EXTI->FTSR2);
-    printf("EXTI_SWIER1 %08lx\n", EXTI->SWIER1);
-    printf("EXTI_SWIER2 %08lx\n", EXTI->SWIER2);
-    printf("EXTI_PR1    %08lx\n", EXTI->PR1);
-    printf("EXTI_PR2    %08lx\n", EXTI->PR2);
+    printf("EXTI_IMR1   %08x\n", (unsigned int)EXTI->IMR1);
+    printf("EXTI_IMR2   %08x\n", (unsigned int)EXTI->IMR2);
+    printf("EXTI_EMR1   %08x\n", (unsigned int)EXTI->EMR1);
+    printf("EXTI_EMR2   %08x\n", (unsigned int)EXTI->EMR2);
+    printf("EXTI_RTSR1  %08x\n", (unsigned int)EXTI->RTSR1);
+    printf("EXTI_RTSR2  %08x\n", (unsigned int)EXTI->RTSR2);
+    printf("EXTI_FTSR1  %08x\n", (unsigned int)EXTI->FTSR1);
+    printf("EXTI_FTSR2  %08x\n", (unsigned int)EXTI->FTSR2);
+    printf("EXTI_SWIER1 %08x\n", (unsigned int)EXTI->SWIER1);
+    printf("EXTI_SWIER2 %08x\n", (unsigned int)EXTI->SWIER2);
+    printf("EXTI_PR1    %08x\n", (unsigned int)EXTI->PR1);
+    printf("EXTI_PR2    %08x\n", (unsigned int)EXTI->PR2);
     #elif defined(STM32H7)
-    printf("EXTI_IMR1   %08lx\n", EXTI_D1->IMR1);
-    printf("EXTI_IMR2   %08lx\n", EXTI_D1->IMR2);
-    printf("EXTI_IMR3   %08lx\n", EXTI_D1->IMR3);
-    printf("EXTI_EMR1   %08lx\n", EXTI_D1->EMR1);
-    printf("EXTI_EMR2   %08lx\n", EXTI_D1->EMR2);
-    printf("EXTI_EMR3   %08lx\n", EXTI_D1->EMR3);
-    printf("EXTI_RTSR1  %08lx\n", EXTI->RTSR1);
-    printf("EXTI_RTSR2  %08lx\n", EXTI->RTSR2);
-    printf("EXTI_RTSR3  %08lx\n", EXTI->RTSR3);
-    printf("EXTI_FTSR1  %08lx\n", EXTI->FTSR1);
-    printf("EXTI_FTSR2  %08lx\n", EXTI->FTSR2);
-    printf("EXTI_FTSR3  %08lx\n", EXTI->FTSR3);
-    printf("EXTI_SWIER1 %08lx\n", EXTI->SWIER1);
-    printf("EXTI_SWIER2 %08lx\n", EXTI->SWIER2);
-    printf("EXTI_SWIER3 %08lx\n", EXTI->SWIER3);
-    printf("EXTI_PR1    %08lx\n", EXTI_D1->PR1);
-    printf("EXTI_PR2    %08lx\n", EXTI_D1->PR2);
-    printf("EXTI_PR3    %08lx\n", EXTI_D1->PR3);
+    printf("EXTI_IMR1   %08x\n", (unsigned int)EXTI_D1->IMR1);
+    printf("EXTI_IMR2   %08x\n", (unsigned int)EXTI_D1->IMR2);
+    printf("EXTI_IMR3   %08x\n", (unsigned int)EXTI_D1->IMR3);
+    printf("EXTI_EMR1   %08x\n", (unsigned int)EXTI_D1->EMR1);
+    printf("EXTI_EMR2   %08x\n", (unsigned int)EXTI_D1->EMR2);
+    printf("EXTI_EMR3   %08x\n", (unsigned int)EXTI_D1->EMR3);
+    printf("EXTI_RTSR1  %08x\n", (unsigned int)EXTI->RTSR1);
+    printf("EXTI_RTSR2  %08x\n", (unsigned int)EXTI->RTSR2);
+    printf("EXTI_RTSR3  %08x\n", (unsigned int)EXTI->RTSR3);
+    printf("EXTI_FTSR1  %08x\n", (unsigned int)EXTI->FTSR1);
+    printf("EXTI_FTSR2  %08x\n", (unsigned int)EXTI->FTSR2);
+    printf("EXTI_FTSR3  %08x\n", (unsigned int)EXTI->FTSR3);
+    printf("EXTI_SWIER1 %08x\n", (unsigned int)EXTI->SWIER1);
+    printf("EXTI_SWIER2 %08x\n", (unsigned int)EXTI->SWIER2);
+    printf("EXTI_SWIER3 %08x\n", (unsigned int)EXTI->SWIER3);
+    printf("EXTI_PR1    %08x\n", (unsigned int)EXTI_D1->PR1);
+    printf("EXTI_PR2    %08x\n", (unsigned int)EXTI_D1->PR2);
+    printf("EXTI_PR3    %08x\n", (unsigned int)EXTI_D1->PR3);
     #else
-    printf("EXTI_IMR   %08lx\n", EXTI->IMR);
-    printf("EXTI_EMR   %08lx\n", EXTI->EMR);
-    printf("EXTI_RTSR  %08lx\n", EXTI->RTSR);
-    printf("EXTI_FTSR  %08lx\n", EXTI->FTSR);
-    printf("EXTI_SWIER %08lx\n", EXTI->SWIER);
-    printf("EXTI_PR    %08lx\n", EXTI->PR);
+    printf("EXTI_IMR   %08x\n", (unsigned int)EXTI->IMR);
+    printf("EXTI_EMR   %08x\n", (unsigned int)EXTI->EMR);
+    printf("EXTI_RTSR  %08x\n", (unsigned int)EXTI->RTSR);
+    printf("EXTI_FTSR  %08x\n", (unsigned int)EXTI->FTSR);
+    printf("EXTI_SWIER %08x\n", (unsigned int)EXTI->SWIER);
+    printf("EXTI_PR    %08x\n", (unsigned int)EXTI->PR);
     #endif
     return mp_const_none;
 }
@@ -534,7 +534,7 @@ void Handle_EXTI_Irq(uint32_t line) {
                     // Uncaught exception; disable the callback so it doesn't run again.
                     *cb = mp_const_none;
                     extint_disable(line);
-                    printf("Uncaught exception in ExtInt interrupt handler line %lu\n", line);
+                    printf("Uncaught exception in ExtInt interrupt handler line %u\n", (unsigned int)line);
                     mp_obj_print_exception(&mp_plat_print, (mp_obj_t)nlr.ret_val);
                 }
                 gc_unlock();

ports/stm32/led.c

@@ -281,7 +281,7 @@ void led_debug(int n, int delay) {
 
 void led_obj_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
     pyb_led_obj_t *self = self_in;
-    mp_printf(print, "LED(%lu)", self->led_id);
+    mp_printf(print, "LED(%u)", self->led_id);
 }
 
 /// \classmethod \constructor(id)

ports/stm32/modmachine.c

@@ -140,11 +140,11 @@ STATIC mp_obj_t machine_info(size_t n_args, const mp_obj_t *args) {
     // get and print clock speeds
     // SYSCLK=168MHz, HCLK=168MHz, PCLK1=42MHz, PCLK2=84MHz
     {
-        printf("S=%lu\nH=%lu\nP1=%lu\nP2=%lu\n",
-               HAL_RCC_GetSysClockFreq(),
-               HAL_RCC_GetHCLKFreq(),
-               HAL_RCC_GetPCLK1Freq(),
-               HAL_RCC_GetPCLK2Freq());
+        printf("S=%u\nH=%u\nP1=%u\nP2=%u\n",
+               (unsigned int)HAL_RCC_GetSysClockFreq(),
+               (unsigned int)HAL_RCC_GetHCLKFreq(),
+               (unsigned int)HAL_RCC_GetPCLK1Freq(),
+               (unsigned int)HAL_RCC_GetPCLK2Freq());
     }
 
     // to print info about memory

ports/stm32/pyb_i2c.c

@@ -198,7 +198,7 @@ STATIC void i2c_set_baudrate(I2C_InitTypeDef *init, uint32_t baudrate) {
         }
     }
     nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError,
-                                            "Unsupported I2C baudrate: %lu", baudrate));
+                                            "Unsupported I2C baudrate: %u", baudrate));
 }
 
 uint32_t pyb_i2c_get_baudrate(I2C_HandleTypeDef *i2c) {

ports/stm32/servo.c

@@ -176,7 +176,7 @@ MP_DEFINE_CONST_FUN_OBJ_2(pyb_pwm_set_obj, pyb_pwm_set);
 
 STATIC void pyb_servo_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
     pyb_servo_obj_t *self = self_in;
-    mp_printf(print, "<Servo %lu at %luus>", self - &pyb_servo_obj[0] + 1, 10 * self->pulse_cur);
+    mp_printf(print, "<Servo %u at %uus>", self - &pyb_servo_obj[0] + 1, 10 * self->pulse_cur);
 }
 
 /// \classmethod \constructor(id)

ports/stm32/timer.c

@@ -1459,7 +1459,7 @@ void timer_irq_handler(uint tim_id) {
         if (unhandled != 0) {
             __HAL_TIM_DISABLE_IT(&tim->tim, unhandled);
             __HAL_TIM_CLEAR_IT(&tim->tim, unhandled);
-            printf("Unhandled interrupt SR=0x%02lx (now disabled)\n", unhandled);
+            printf("Unhandled interrupt SR=0x%02x (now disabled)\n", (unsigned int)unhandled);
         }
     }
 }