zephyr/modusocket: Use DEBUG_PRINT macro name as other modules do.

Indeed, just "DEBUG" is too generic.

zephyr/modusocket.c

@@ -38,8 +38,8 @@
 #include <net/net_pkt.h>
 #include <net/dns_resolve.h>
 
-#define DEBUG 0
-#if DEBUG // print debugging info
+#define DEBUG_PRINT 0
+#if DEBUG_PRINT // print debugging info
 #define DEBUG_printf printf
 #else // don't print debugging info
 #define DEBUG_printf(...) (void)0
@@ -165,7 +165,7 @@ static void sock_received_cb(struct net_context *context, struct net_pkt *pkt, i
         DEBUG_printf(" (appdatalen=%d), token: %p", pkt->appdatalen, net_pkt_token(pkt));
     }
     DEBUG_printf("\n");
-    #if DEBUG > 1
+    #if DEBUG_PRINT > 1
     net_pkt_print_frags(pkt);
     #endif