[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/include/linux/netfilter/x_tables.h b/include/linux/netfilter/x_tables.h
index 64f425a8..03e6ce9 100644
--- a/include/linux/netfilter/x_tables.h
+++ b/include/linux/netfilter/x_tables.h
@@ -191,7 +191,7 @@
 	/* Returns verdict. Argument order changed since 2.6.9, as this
 	   must now handle non-linear skbs, using skb_copy_bits and
 	   skb_ip_make_writable. */
-	unsigned int (*target)(struct sk_buff **pskb,
+	unsigned int (*target)(struct sk_buff *skb,
 			       const struct net_device *in,
 			       const struct net_device *out,
 			       unsigned int hooknum,