mac802154: move interface del handling in iface

This patch moves and rename the mac802154_del_iface function into
iface.c and rename the function to ieee802154_if_remove which is a similar
naming convention like mac80211.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/mac802154/ieee802154_i.h b/net/mac802154/ieee802154_i.h
index 27e17e6..61a6a0f 100644
--- a/net/mac802154/ieee802154_i.h
+++ b/net/mac802154/ieee802154_i.h
@@ -175,6 +175,6 @@
 
 struct net_device *
 mac802154_add_iface(struct wpan_phy *phy, const char *name, int type);
-void mac802154_del_iface(struct wpan_phy *phy, struct net_device *dev);
+void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata);
 
 #endif /* __IEEE802154_I_H */