Fix rgb matrix helper function

layouts/community/ergodox/drashna/keymap.c

@@ -399,7 +399,8 @@ void suspend_wakeup_init_keymap(void) {
     rgb_matrix_set_suspend_state(false);
 }
 
-void rgb_matrix_layer_helper (uint8_t red, uint8_t green, uint8_t blue, bool default_layer) {
+extern led_config_t g_led_config;
+void rgb_matrix_layer_helper (uint8_t red, uint8_t green, uint8_t blue) {
     for (int i = 0; i < DRIVER_LED_TOTAL; i++) {
         if (HAS_FLAGS(g_led_config.flags[i], LED_FLAG_MODIFIER)) {
             rgb_matrix_set_color( i, red, green, blue );