Make Magic handling more consistent in Action Keycode handling (#9126)

Co-authored-by: Ryan <[email protected]>

quantum/keycode_config.c

@@ -16,14 +16,12 @@
 
 #include "keycode_config.h"
 
-extern keymap_config_t keymap_config;
-
 /** \brief keycode_config
  *
  * This function is used to check a specific keycode against the bootmagic config,
  * and will return the corrected keycode, when appropriate.
  */
-uint16_t keycode_config(uint16_t keycode) {
+__attribute__((weak)) uint16_t keycode_config(uint16_t keycode) {
     switch (keycode) {
         case KC_CAPS_LOCK:
         case KC_LOCKING_CAPS_LOCK:
@@ -123,7 +121,7 @@ uint16_t keycode_config(uint16_t keycode) {
  *  and will remove or replace mods, based on that.
  */
 
-uint8_t mod_config(uint8_t mod) {
+__attribute__((weak)) uint8_t mod_config(uint8_t mod) {
     if (keymap_config.swap_lalt_lgui) {
         if ((mod & MOD_RGUI) == MOD_LGUI) {
             mod &= ~MOD_LGUI;