ipv6: Get rid of rt6i_nexthop macro.

It just makes it harder to see 1) what the code is doing
and 2) grep for all users of dst{->,.}neighbour

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index e08ce55..a997d41 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -1238,7 +1238,7 @@
 	rt = rt6_get_dflt_router(&ipv6_hdr(skb)->saddr, skb->dev);
 
 	if (rt)
-		neigh = rt->rt6i_nexthop;
+		neigh = rt->dst.neighbour;
 
 	if (rt && lifetime == 0) {
 		neigh_clone(neigh);
@@ -1259,7 +1259,7 @@
 			return;
 		}
 
-		neigh = rt->rt6i_nexthop;
+		neigh = rt->dst.neighbour;
 		if (neigh == NULL) {
 			ND_PRINTK0(KERN_ERR
 				   "ICMPv6 RA: %s() got default router without neighbour.\n",