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

keyboards/atxkb/1894/config.h

@@ -17,7 +17,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #pragma once
 
-#define RGB_DI_PIN D2
   #define RGBLED_NUM 14
   #define RGBLIGHT_HUE_STEP 8
   #define RGBLIGHT_SAT_STEP 8

keyboards/atxkb/1894/info.json

@@ -18,6 +18,9 @@
         "levels": 5,
         "breathing": true
     },
+    "ws2812": {
+        "pin": "D2"
+    },
     "processor": "atmega32u4",
     "bootloader": "atmel-dfu",
     "community_layouts": ["60_ansi", "60_ansi_split_bs_rshift", "60_tsangan_hhkb"],