net: Break struct flowi out into AF specific instances.

Now we have struct flowi4, flowi6, and flowidn for each address
family.  And struct flowi is just a union of them all.

It might have been troublesome to convert flow_cache_uli_match() but
as it turns out this function is completely unused and therefore can
be simply removed.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index d54b6e7..2ecd18a 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -61,8 +61,8 @@
 {
 	return  addr_match(&fl->fl4_dst, &sel->daddr, sel->prefixlen_d) &&
 		addr_match(&fl->fl4_src, &sel->saddr, sel->prefixlen_s) &&
-		!((xfrm_flowi_dport(fl, &fl->uli_u) ^ sel->dport) & sel->dport_mask) &&
-		!((xfrm_flowi_sport(fl, &fl->uli_u) ^ sel->sport) & sel->sport_mask) &&
+		!((xfrm_flowi_dport(fl, &fl->u.ip4.uli) ^ sel->dport) & sel->dport_mask) &&
+		!((xfrm_flowi_sport(fl, &fl->u.ip4.uli) ^ sel->sport) & sel->sport_mask) &&
 		(fl->flowi_proto == sel->proto || !sel->proto) &&
 		(fl->flowi_oif == sel->ifindex || !sel->ifindex);
 }
@@ -72,8 +72,8 @@
 {
 	return  addr_match(&fl->fl6_dst, &sel->daddr, sel->prefixlen_d) &&
 		addr_match(&fl->fl6_src, &sel->saddr, sel->prefixlen_s) &&
-		!((xfrm_flowi_dport(fl, &fl->uli_u) ^ sel->dport) & sel->dport_mask) &&
-		!((xfrm_flowi_sport(fl, &fl->uli_u) ^ sel->sport) & sel->sport_mask) &&
+		!((xfrm_flowi_dport(fl, &fl->u.ip6.uli) ^ sel->dport) & sel->dport_mask) &&
+		!((xfrm_flowi_sport(fl, &fl->u.ip6.uli) ^ sel->sport) & sel->sport_mask) &&
 		(fl->flowi_proto == sel->proto || !sel->proto) &&
 		(fl->flowi_oif == sel->ifindex || !sel->ifindex);
 }