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

keyboards/lfkeyboards/lfkpad/config.h

@@ -17,7 +17,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-#define RGB_DI_PIN C7  // Have to set it to something to get the ws2812 code to compile
 #    define RGBLED_NUM 28
 #    define RGBLIGHT_HUE_STEP 10
 #    define RGBLIGHT_SAT_STEP 17

keyboards/lfkeyboards/lfkpad/info.json

@@ -8,6 +8,9 @@
         "pid": "0x3231",
         "device_version": "0.0.1"
     },
+    "ws2812": {
+        "pin": "C7"
+    },
     "matrix_pins": {
         "cols": ["F1", "F0", "D4", "D6"],
         "rows": ["D5", "F4", "F6", "F7", "C7", "C6"]