Add boardsource/lulu RP2040 support (#18200)

by waffle87

keyboards/boardsource/lulu/config.h

@@ -2,8 +2,6 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #pragma once
-#include "config_common.h"
-#define RGB_DI_PIN D3
 #define RGB_MATRIX_MAXIMUM_BRIGHTNESS 150
 #define DRIVER_LED_TOTAL 70
 #define RGB_MATRIX_SPLIT { 35, 35 }