[XFRM]: Fix protocol field value for outgoing IPv6 GSO packets

Signed-off-by: Patrick McHardy <kaber@trash.net>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv6/xfrm6_output.c

@@ -125,7 +125,7 @@ static int xfrm6_output_finish(struct sk_buff *skb)
 	if (!skb_is_gso(skb))
 		return xfrm6_output_finish2(skb);
 
-	skb->protocol = htons(ETH_P_IP);
+	skb->protocol = htons(ETH_P_IPV6);
 	segs = skb_gso_segment(skb, 0);
 	kfree_skb(skb);
 	if (unlikely(IS_ERR(segs)))