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

keyboards/linworks/whale75/config.h

@@ -24,7 +24,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define BACKLIGHT_PWM_OUTPUT_FREQUENCY 1000 // Increases backlight PWM freq if compiled with an unmerged PR. Does no harm without it.
 
 /* Underglow */
-#define RGB_DI_PIN B9
 #define WS2812_EXTERNAL_PULLUP // This board uses a pull-up + 5 V tolerant GPIO in open drain config ro generate a 5 V signal
 #define RGBLED_NUM 18
 /* section for PWM WS2812 driver */

keyboards/linworks/whale75/info.json

@@ -8,6 +8,7 @@
         "device_version": "0.0.1"
     },
     "ws2812": {
+        "pin": "B9",
         "driver": "pwm"
     },
     "matrix_pins": {