[IPV6]: Replace sk_buff ** with sk_buff * in input handlers

With all the users of the double pointers removed from the IPv6 input path,
this patch converts all occurances of sk_buff ** to sk_buff * in IPv6 input
handlers.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index 006a383..cac5354 100644
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -767,10 +767,9 @@
 	return 0;
 }
 
-static int dccp_v6_rcv(struct sk_buff **pskb)
+static int dccp_v6_rcv(struct sk_buff *skb)
 {
 	const struct dccp_hdr *dh;
-	struct sk_buff *skb = *pskb;
 	struct sock *sk;
 	int min_cov;