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/ipmr.c b/net/ipv4/ipmr.c
index ef2b008..3f3a9af 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -1537,13 +1537,9 @@
 	if (vif->flags & VIFF_TUNNEL) {
 		struct flowi fl = {
 			.oif = vif->link,
-			.nl_u = {
-				.ip4_u = {
-					.daddr = vif->remote,
-					.saddr = vif->local,
-					.tos = RT_TOS(iph->tos)
-				}
-			},
+			.fl4_dst = vif->remote,
+			.fl4_src = vif->local,
+			.fl4_tos = RT_TOS(iph->tos),
 			.proto = IPPROTO_IPIP
 		};
 
@@ -1553,12 +1549,8 @@
 	} else {
 		struct flowi fl = {
 			.oif = vif->link,
-			.nl_u = {
-				.ip4_u = {
-					.daddr = iph->daddr,
-					.tos = RT_TOS(iph->tos)
-				}
-			},
+			.fl4_dst = iph->daddr,
+			.fl4_tos = RT_TOS(iph->tos),
 			.proto = IPPROTO_IPIP
 		};