added macro flag to prevent redefinition

Author: garethhcoleman

variants/unphone9/pins_arduino.h

@@ -64,5 +64,6 @@ static const uint8_t D11 = 17;
 static const uint8_t D12 = 12;
 static const uint8_t D13 = 13;
 static const uint8_t D21 = 47;
+#define UNPHONE_D_PINS_MAPPED
 
 #endif /* Pins_Arduino_h */