[VLAN] vlan_dev: Use skb_reset_network_header().

Signed-off-by: David S. Miller <[e-mail]>

net/8021q/vlan_dev.c

···
 		}
 
 		skb->protocol = htons(ETH_P_8021Q);
-		skb->nh.raw = skb->data;
+		skb_reset_network_header(skb);
 	}
 
 	/* Before delegating work to the lower layer, enter our MAC-address */