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/include/net/ip6_fib.h b/include/net/ip6_fib.h
index 4b1dc11..062a823 100644
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -84,13 +84,11 @@
 struct fib6_table;
 
 struct rt6_info {
-	union {
-		struct dst_entry	dst;
-	} u;
+	struct dst_entry		dst;
 
-#define rt6i_dev			u.dst.dev
-#define rt6i_nexthop			u.dst.neighbour
-#define rt6i_expires			u.dst.expires
+#define rt6i_dev			dst.dev
+#define rt6i_nexthop			dst.neighbour
+#define rt6i_expires			dst.expires
 
 	/*
 	 * Tail elements of dst_entry (__refcnt etc.)