wifi: iwlwifi: restore missing initialization of async_handlers_list

JIRA: https://issues.redhat.com/browse/RHEL-89168

commit 175e69e
Author: Itamar Shalev <itamar.shalev@intel.com>
Date:   Wed Apr 23 12:25:02 2025 +0300

    wifi: iwlwifi: restore missing initialization of async_handlers_list
    
    The initialization of async_handlers_list
    was accidentally removed in a previous change.
    This patch restores the missing initialization
    to ensure proper handler registration.
    
    Fixes: 6895d74 ("wifi: iwlwifi: mld: initialize regulatory early")
    Signed-off-by: Itamar Shalev <itamar.shalev@intel.com>
    Acked-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
    Link: https://patch.msgid.link/20250423092503.35206-1-itamar.shalev@intel.com
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Signed-off-by: Jose Ignacio Tornos Martinez <jtornosm@redhat.com>

Author: jtornosm

drivers/net/wireless/intel/iwlwifi/mld/mld.c

@@ -75,6 +75,7 @@ void iwl_construct_mld(struct iwl_mld *mld, struct iwl_trans *trans,
 
 	/* Setup async RX handling */
 	spin_lock_init(&mld->async_handlers_lock);
+	INIT_LIST_HEAD(&mld->async_handlers_list);
 	wiphy_work_init(&mld->async_handlers_wk,
 			iwl_mld_async_handlers_wk);