added display support for RAK4631, removed Wire.begin(int, int) from nrf52 devices, cosmetic changes

src/helpers/nrf52/faketecBoard.h

@@ -31,11 +31,7 @@ public:
 
     pinMode(PIN_VBAT_READ, INPUT);
 
-    #if defined(PIN_BOARD_SDA) && defined(PIN_BOARD_SCL)
-      Wire.begin(PIN_BOARD_SDA, PIN_BOARD_SCL);
-    #else
-      Wire.begin();
-    #endif
+    Wire.begin();
 
     pinMode(SX126X_POWER_EN, OUTPUT);
     digitalWrite(SX126X_POWER_EN, HIGH);