Fix Reading MAC from efuse for ESP32 Arduino 2.x.x (#6458) (#6459)

Also support ESP_IDF_VERSION_MAJOR > 3
Fixes #6458
Co-authored-by: Rodrigo Garcia <rodrigo.garcia@espressif.com>
Co-authored-by: Me No Dev <me-no-dev@users.noreply.github.com>

libraries/Ethernet/src/ETH.cpp

@@ -226,12 +226,19 @@ ETHClass::ETHClass()
 ETHClass::~ETHClass()
 {}
 
-bool ETHClass::begin(uint8_t phy_addr, int power, int mdc, int mdio, eth_phy_type_t type, eth_clock_mode_t clock_mode)
+bool ETHClass::begin(uint8_t phy_addr, int power, int mdc, int mdio, eth_phy_type_t type, eth_clock_mode_t clock_mode, bool use_mac_from_efuse)
 {
 #if ESP_IDF_VERSION_MAJOR > 3
     eth_clock_mode = clock_mode;
     tcpipInit();
 
+    if (use_mac_from_efuse)
+    {
+        uint8_t p[6] = { 0x00,0x00,0x00,0x00,0x00,0x00 };
+        esp_efuse_mac_get_custom(p);
+        esp_base_mac_addr_set(p);
+    }
+
     tcpip_adapter_set_default_eth_handlers();
     
     esp_netif_config_t cfg = ESP_NETIF_DEFAULT_ETH();
@@ -363,6 +370,14 @@ bool ETHClass::begin(uint8_t phy_addr, int power, int mdc, int mdio, eth_phy_typ
     }
 
     tcpipInit();
+
+    if (use_mac_from_efuse)
+    {
+        uint8_t p[6] = { 0x00,0x00,0x00,0x00,0x00,0x00 };
+        esp_efuse_mac_get_custom(p);
+        esp_base_mac_addr_set(p);
+    }
+
     err = esp_eth_init(&eth_config);
     if(!err){
         initialized = true;

libraries/Ethernet/src/ETH.h

@@ -75,7 +75,7 @@ class ETHClass {
         ETHClass();
         ~ETHClass();
 
-        bool begin(uint8_t phy_addr=ETH_PHY_ADDR, int power=ETH_PHY_POWER, int mdc=ETH_PHY_MDC, int mdio=ETH_PHY_MDIO, eth_phy_type_t type=ETH_PHY_TYPE, eth_clock_mode_t clk_mode=ETH_CLK_MODE);
+        bool begin(uint8_t phy_addr=ETH_PHY_ADDR, int power=ETH_PHY_POWER, int mdc=ETH_PHY_MDC, int mdio=ETH_PHY_MDIO, eth_phy_type_t type=ETH_PHY_TYPE, eth_clock_mode_t clk_mode=ETH_CLK_MODE, bool use_mac_from_efuse=false);
 
         bool config(IPAddress local_ip, IPAddress gateway, IPAddress subnet, IPAddress dns1 = (uint32_t)0x00000000, IPAddress dns2 = (uint32_t)0x00000000);