ipv6: Fix types of ip6_update_pmtu().

The mtu should be a __be32, not the mark.

Reported-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index c7ccc36..1c279fe 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1065,8 +1065,8 @@
 	}
 }
 
-void ip6_update_pmtu(struct sk_buff *skb, struct net *net, u32 mtu,
-		     int oif, __be32 mark)
+void ip6_update_pmtu(struct sk_buff *skb, struct net *net, __be32 mtu,
+		     int oif, u32 mark)
 {
 	const struct ipv6hdr *iph = (struct ipv6hdr *) skb->data;
 	struct dst_entry *dst;