xfrm: Handle blackhole route creation via afinfo.

That way we don't have to potentially do this in every xfrm_lookup()
caller.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 5d125c1..d6d077d 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -520,8 +520,8 @@
 						       struct flowi *fl,
 						       const struct in6_addr *final_dst,
 						       bool can_sleep);
-extern struct dst_entry *	ip6_dst_blackhole(struct net *net,
-						  struct dst_entry *orig_dst);
+extern struct dst_entry *	ip6_blackhole_route(struct net *net,
+						    struct dst_entry *orig_dst);
 
 /*
  *	skb processing functions