net-next: remove useless union keyword

remove useless union keyword in rtable, rt6_info and dn_route.

Since there is only one member in a union, the union keyword isn't useful.

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index eec4ff4..32e0bef 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -914,7 +914,7 @@
 		    !sock_flag(sk, SOCK_BROADCAST))
 			goto out;
 		if (connected)
-			sk_dst_set(sk, dst_clone(&rt->u.dst));
+			sk_dst_set(sk, dst_clone(&rt->dst));
 	}
 
 	if (msg->msg_flags&MSG_CONFIRM)
@@ -978,7 +978,7 @@
 	return err;
 
 do_confirm:
-	dst_confirm(&rt->u.dst);
+	dst_confirm(&rt->dst);
 	if (!(msg->msg_flags&MSG_PROBE) || len)
 		goto back_from_confirm;
 	err = 0;