[IPSEC]: Kill afinfo->nf_post_routing

After changeset:

	[NETFILTER]: Introduce NF_INET_ hook values

It always evaluates to NF_INET_POST_ROUTING.
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/xfrm.h

@@ -259,7 +259,6 @@ struct xfrm_state_afinfo {
 	unsigned int		family;
 	unsigned int		proto;
 	unsigned int		eth_proto;
-	unsigned int		nf_post_routing;
 	struct module		*owner;
 	struct xfrm_type	*type_map[IPPROTO_MAX];
 	struct xfrm_mode	*mode_map[XFRM_MODE_MAX];

net/ipv4/xfrm4_state.c

@@ -66,7 +66,6 @@ static struct xfrm_state_afinfo xfrm4_state_afinfo = {
 	.family			= AF_INET,
 	.proto			= IPPROTO_IPIP,
 	.eth_proto		= htons(ETH_P_IP),
-	.nf_post_routing	= NF_INET_POST_ROUTING,
 	.owner			= THIS_MODULE,
 	.init_flags		= xfrm4_init_flags,
 	.init_tempsel		= __xfrm4_init_tempsel,

net/ipv6/xfrm6_state.c

@@ -188,7 +188,6 @@ static struct xfrm_state_afinfo xfrm6_state_afinfo = {
 	.family			= AF_INET6,
 	.proto			= IPPROTO_IPV6,
 	.eth_proto		= htons(ETH_P_IPV6),
-	.nf_post_routing	= NF_INET_POST_ROUTING,
 	.owner			= THIS_MODULE,
 	.init_tempsel		= __xfrm6_init_tempsel,
 	.tmpl_sort		= __xfrm6_tmpl_sort,

net/xfrm/xfrm_output.c

@@ -113,7 +113,7 @@ int xfrm_output_resume(struct sk_buff *skb, int err)
 			return dst_output(skb);
 
 		err = nf_hook(x->inner_mode->afinfo->family,
-			      x->inner_mode->afinfo->nf_post_routing, skb,
+			      NF_INET_POST_ROUTING, skb,
 			      NULL, skb->dst->dev, xfrm_output2);
 		if (unlikely(err != 1))
 			goto out;