Move RGBLED_SPLIT to data driven (#21113)

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

keyboards/omkbd/ergodash/rev1/config.h

@@ -41,7 +41,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define RGBLIGHT_EFFECT_TWINKLE
 #define RGBLED_NUM 24
 #define RGBLIGHT_SPLIT
-#define RGBLED_SPLIT { 12, 12 }    // Number of LEDs
 
 // The LEDs on the slave half go in reverse order
 #define RGBLIGHT_LED_MAP { 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, \

keyboards/omkbd/ergodash/rev1/info.json

@@ -20,6 +20,9 @@
     "split": {
         "soft_serial_pin": "D0"
     },
+    "rgblight": {
+        "split_count": [12, 12]
+    },
     "ws2812": {
         "pin": "D3"
     },