net: use the macros defined for the members of flowi

Use the macros defined for the members of flowi to clean the code up.

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index cd300aa..e70ad58 100644
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -463,13 +463,9 @@
 	{
 		struct flowi fl = {
 			.oif = tunnel->parms.link,
-			.nl_u = {
-				.ip4_u = {
-					.daddr = dst,
-					.saddr = tiph->saddr,
-					.tos = RT_TOS(tos)
-				}
-			},
+			.fl4_dst = dst,
+			.fl4_src= tiph->saddr,
+			.fl4_tos = RT_TOS(tos),
 			.proto = IPPROTO_IPIP
 		};
 
@@ -589,13 +585,9 @@
 	if (iph->daddr) {
 		struct flowi fl = {
 			.oif = tunnel->parms.link,
-			.nl_u = {
-				.ip4_u = {
-					.daddr = iph->daddr,
-					.saddr = iph->saddr,
-					.tos = RT_TOS(iph->tos)
-				}
-			},
+			.fl4_dst = iph->daddr,
+			.fl4_src = iph->saddr,
+			.fl4_tos = RT_TOS(iph->tos),
 			.proto = IPPROTO_IPIP
 		};
 		struct rtable *rt;