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/iface.c b/net/mac802154/iface.c
index 83715b5..8d90fba 100644
--- a/net/mac802154/iface.c
+++ b/net/mac802154/iface.c
@@ -535,3 +535,16 @@
 	synchronize_rcu();
 	unregister_netdevice(sdata->dev);
 }
+
+void ieee802154_remove_interfaces(struct ieee802154_local *local)
+{
+	struct ieee802154_sub_if_data *sdata, *next;
+
+	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);
+	}
+}