Migrate rgblight.pin and RGB_DI_PIN to ws2812.pin (#20303)

keyboards/handwired/croxsplit44/config.h

@@ -17,7 +17,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-#define RGB_DI_PIN C4
     #define RGBLED_NUM 42
     #define RGBLIGHT_HUE_STEP 8
     #define RGBLIGHT_SAT_STEP 8

keyboards/handwired/croxsplit44/info.json

@@ -8,6 +8,9 @@
         "pid": "0x6146",
         "device_version": "0.0.1"
     },
+    "ws2812": {
+        "pin": "C4"
+    },
     "matrix_pins": {
         "cols": ["B6", "B5", "B4", "D2", "C0", "C1", "F5", "F4", "F3", "F2", "F1", "F0"],
         "rows": ["D4", "D5", "D6", "D7"]