Fixes for targets without external module

radio/src/io/frsky_firmware_update.cpp

@@ -798,8 +798,10 @@ const char * FrskyChipFirmwareUpdate::flashFirmware(const char * filename, Progr
   INTERNAL_MODULE_OFF();
 #endif
 
+#if defined(HARDWARE_EXTERNAL_MODULE)
   uint8_t extPwr = IS_EXTERNAL_MODULE_ON();
   EXTERNAL_MODULE_OFF();
+#endif
 
 #if defined(SPORT_UPDATE_PWR_GPIO)
   uint8_t spuPwr = IS_SPORT_UPDATE_POWER_ON();