Compilation fix

radio/src/targets/sky9x/board_sky9x.h

@@ -290,7 +290,6 @@ uint32_t telemetryTransmitPending();
 void telemetryTransmitBuffer(uint8_t * buffer, uint32_t size);
 
 // Second UART driver
-#define serial2TracesEnabled()          false
 void serial2TelemetryInit(unsigned int protocol);
 bool telemetrySecondPortReceive(uint8_t & data);
 

radio/src/targets/sky9x/serial2_driver.cpp

@@ -64,6 +64,11 @@ void serial2Putc(const char c)
   pUart->UART_THR = c;
 }
 
+uint8_t serial2TracesEnabled()
+{
+  return false;
+}
+
 /**
  * Configures a UART peripheral with the specified parameters.
  *