Small un/register_code() cleanups (#18544)

quantum/action_code.h

@@ -192,7 +192,11 @@ enum mods_codes {
 
 /** \brief Other Keys
  */
-enum usage_pages { PAGE_SYSTEM, PAGE_CONSUMER };
+enum usage_pages {
+    PAGE_SYSTEM,
+    PAGE_CONSUMER,
+};
+
 #define ACTION_USAGE_SYSTEM(id) ACTION(ACT_USAGE, PAGE_SYSTEM << 10 | (id))
 #define ACTION_USAGE_CONSUMER(id) ACTION(ACT_USAGE, PAGE_CONSUMER << 10 | (id))
 #define ACTION_MOUSEKEY(key) ACTION(ACT_MOUSEKEY, key)