[NETFILTER]: Introduce NF_INET_ hook values

The IPv4 and IPv6 hook values are identical, yet some code tries to figure
out the "correct" value by looking at the address family. Introduce NF_INET_*
values for both IPv4 and IPv6. The old values are kept in a #ifndef __KERNEL__
section for userspace compatibility.

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>
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index fac6f7f..79610b4 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -134,7 +134,8 @@
 
 	rcu_read_unlock();
 
-	return NF_HOOK(PF_INET6,NF_IP6_PRE_ROUTING, skb, dev, NULL, ip6_rcv_finish);
+	return NF_HOOK(PF_INET6, NF_INET_PRE_ROUTING, skb, dev, NULL,
+		       ip6_rcv_finish);
 err:
 	IP6_INC_STATS_BH(idev, IPSTATS_MIB_INHDRERRORS);
 drop:
@@ -229,7 +230,8 @@
 
 int ip6_input(struct sk_buff *skb)
 {
-	return NF_HOOK(PF_INET6,NF_IP6_LOCAL_IN, skb, skb->dev, NULL, ip6_input_finish);
+	return NF_HOOK(PF_INET6, NF_INET_LOCAL_IN, skb, skb->dev, NULL,
+		       ip6_input_finish);
 }
 
 int ip6_mc_input(struct sk_buff *skb)