[NETFILTER]: Replace sk_buff ** with sk_buff *

With all the users of the double pointers removed, this patch mops up by
finally replacing all occurances of sk_buff ** in the netfilter API by
sk_buff *.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c
index f8e0a2f..3cedd4e 100644
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -149,7 +149,7 @@
 	case BR_STATE_FORWARDING:
 
 		if (br_should_route_hook) {
-			if (br_should_route_hook(&skb))
+			if (br_should_route_hook(skb))
 				return skb;
 			dest = eth_hdr(skb)->h_dest;
 		}