Added a build flag for using a custom rgblight driver

quantum/rgblight.h

@@ -61,7 +61,10 @@
 #include <stdint.h>
 #include <stdbool.h>
 #include "eeconfig.h"
+#ifndef RGBLIGHT_CUSTOM_DRIVER
 #include "light_ws2812.h"
+#endif
+#include "rgblight_types.h"
 
 extern LED_TYPE led[RGBLED_NUM];