Add init function to RGBLight driver struct (#23076)

keyboards/1k/keymaps/default/keymap.c

@@ -21,5 +21,6 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
 }
 
 void keyboard_post_init_user(void) {
+  rgblite_init();
   rgblite_increase_hue();
 }

keyboards/1k/keymaps/default/rgblite.h

@@ -6,6 +6,10 @@
 #include "ws2812.h"
 #include "color.h"
 
+static inline void rgblite_init(void) {
+    ws2812_init();
+}
+
 static inline void rgblite_setrgb(RGB rgb) {
     rgb_led_t leds[RGBLIGHT_LED_COUNT] = {{.r = rgb.r, .g = rgb.g, .b = rgb.b}};
     ws2812_setleds(leds, RGBLIGHT_LED_COUNT);