Move Pointing Device Initialization (#17740)

Move Pointing Device Initialization to after Split Post Initialization

If both pointing device and split is enabled, the pointing device init needs to be called after the split post init, otherwise the connection (serial/etc) isn't initialized yet, and any commands that need to send data over (such as calling the set cpi command) never get sent over.

quantum/keyboard.c

@@ -384,9 +384,6 @@ void keyboard_init(void) {
 #ifdef STENO_ENABLE_ALL
     steno_init();
 #endif
-#ifdef POINTING_DEVICE_ENABLE
-    pointing_device_init();
-#endif
 #if defined(NKRO_ENABLE) && defined(FORCE_NKRO)
     keymap_config.nkro = 1;
     eeconfig_update_keymap(keymap_config.raw);
@@ -403,6 +400,10 @@ void keyboard_init(void) {
 #ifdef SPLIT_KEYBOARD
     split_post_init();
 #endif
+#ifdef POINTING_DEVICE_ENABLE
+    // init after split init
+    pointing_device_init();
+#endif
 
 #if defined(DEBUG_MATRIX_SCAN_RATE) && defined(CONSOLE_ENABLE)
     debug_enable = true;