wifi: iwlwifi: restore missing initialization of async_handlers_list (again)

The initialization of async_handlers_list
was accidentally removed in a previous change.

Then it was restoted by commit 175e69e ("wifi: iwlwifi: restore
missing initialization of async_handlers_list").

Somehow, the initialization disappeared again.
Restote it.

Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>

Author: Miriam-Rachel

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

@@ -77,6 +77,7 @@ 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);