dsa: remove unused net_device arg from handlers

compile tested only, but saw no warnings/errors with
allmodconfig build.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/dsa/tag_mtk.c b/net/dsa/tag_mtk.c
index 02163c0..ec8ee5f 100644
--- a/net/dsa/tag_mtk.c
+++ b/net/dsa/tag_mtk.c
@@ -44,8 +44,7 @@ static struct sk_buff *mtk_tag_xmit(struct sk_buff *skb,
 }
 
 static struct sk_buff *mtk_tag_rcv(struct sk_buff *skb, struct net_device *dev,
-				   struct packet_type *pt,
-				   struct net_device *orig_dev)
+				   struct packet_type *pt)
 {
 	struct dsa_switch_tree *dst = dev->dsa_ptr;
 	struct dsa_switch *ds;