Add ability to specify a config.c file for a config target (#14180)

- adding configTargetPreInit() method to execute code for the config target

src/main/fc/init.c

@@ -278,15 +278,15 @@ void init(void)
     // initialize IO (needed for all IO operations)
     IOInitGlobal();
 
-#ifdef USE_HARDWARE_REVISION_DETECTION
-    detectHardwareRevision();
-#endif
-
 #if defined(USE_TARGET_CONFIG)
     // Call once before the config is loaded for any target specific configuration required to support loading the config
     targetConfiguration();
 #endif
 
+#if defined(USE_CONFIG_TARGET_PREINIT)
+    configTargetPreInit();
+#endif
+
     enum {
         FLASH_INIT_ATTEMPTED                = (1 << 0),
         SD_INIT_ATTEMPTED                   = (1 << 1),