build fix to support RTC detection code

src/helpers/nrf52/faketecBoard.h

@@ -2,6 +2,7 @@
 
 #include <MeshCore.h>
 #include <Arduino.h>
+#include <Wire.h>
 
 #define P_LORA_NSS D13 //P1.13 45
 #define P_LORA_DIO_1 D11 //P0.10 10
@@ -30,6 +31,12 @@ 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
+
     pinMode(SX126X_POWER_EN, OUTPUT);
     digitalWrite(SX126X_POWER_EN, HIGH);
     delay(10);   // give sx1262 some time to power up