mac820154: move interface unregistration into iface

This patch move the iface unregistration into iface.c file to have
a behaviour which is similar like mac80211. Also iface handling should
be inside iface.c file only.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/mac802154/main.c b/net/mac802154/main.c
index 234084d..709dcc5 100644
--- a/net/mac802154/main.c
+++ b/net/mac802154/main.c
@@ -165,7 +165,6 @@
 void ieee802154_unregister_hw(struct ieee802154_hw *hw)
 {
 	struct ieee802154_local *local = hw_to_local(hw);
-	struct ieee802154_sub_if_data *sdata, *next;
 
 	tasklet_kill(&local->tasklet);
 	flush_workqueue(local->workqueue);
@@ -173,13 +172,7 @@
 
 	rtnl_lock();
 
-	list_for_each_entry_safe(sdata, next, &local->interfaces, list) {
-		mutex_lock(&sdata->local->iflist_mtx);
-		list_del(&sdata->list);
-		mutex_unlock(&sdata->local->iflist_mtx);
-
-		unregister_netdevice(sdata->dev);
-	}
+	ieee802154_remove_interfaces(local);
 
 	rtnl_unlock();