Move RGB_MATRIX_DRIVER to data driven (#20350)

keyboards/ein_60/info.json

@@ -8,6 +8,9 @@
         "pid": "0x0003",
         "device_version": "0.0.1"
     },
+    "rgb_matrix": {
+        "driver": "WS2812"
+    },
     "matrix_pins": {
         "cols": ["A3", "A2", "A1", "A0", "F6", "F5", "F0", "E0", "E1", "C0", "C1", "C2", "C3"],
         "rows": ["F1", "F2", "F3", "F4"]

keyboards/ein_60/rules.mk

@@ -11,7 +11,6 @@ BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
 RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
 AUDIO_ENABLE = no           # Audio output
 RGB_MATRIX_ENABLE = no      # Enable for pretty RGB matrix effects
-RGB_MATRIX_DRIVER = WS2812  # Define RGB Matrix
 ENCODER_ENABLE = yes        # Enables the use of one or more encoders
 OLED_ENABLE = yes           # Enables the use of OLED displays
 OLED_DRIVER = SSD1306