Move RGBLED_SPLIT to data driven (#21113)

Co-authored-by: Joel Challis <git@zvecr.com>

keyboards/doppelganger/config.h

@@ -23,7 +23,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #define RGBLED_NUM 2
 #define RGBLIGHT_SPLIT
-#define RGBLED_SPLIT { 1, 1 }
 
 /* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
 #define LOCKING_SUPPORT_ENABLE

keyboards/doppelganger/info.json

@@ -22,6 +22,9 @@
             }
         }
     },
+    "rgblight": {
+        "split_count": [1, 1]
+    },
     "ws2812": {
         "pin": "B4"
     },