Set the correct RGB LED count on YD60MQ (#8629)

* Fix RGB LED count on YD60MQ

* Split YD60MQ into 12-LED and 16-LED revisions

* Update readmes

* Make 12led the default version

* Readd base rules.mk, version→variant in readme

* Add syntax highlighting to code blocks in readme

keyboards/yd60mq/config.h

@@ -5,7 +5,6 @@
 /* USB Device descriptor parameter */
 #define VENDOR_ID       0xFEED
 #define PRODUCT_ID      0x6060
-#define DEVICE_VER      0x0001
 #define MANUFACTURER    YMDK
 #define PRODUCT         YD60MQ
 #define DESCRIPTION     Keyboard
@@ -37,10 +36,8 @@
 /* prevent stuck modifiers */
 
 #define RGB_DI_PIN E2
-#ifdef RGB_DI_PIN
 #define RGBLIGHT_ANIMATIONS
-#define RGBLED_NUM 12
 #define RGBLIGHT_HUE_STEP 8
 #define RGBLIGHT_SAT_STEP 8
 #define RGBLIGHT_VAL_STEP 8
-#endif
+// RGBLED_NUM is defined in revisions