ipv4: Renamt struct rtable's rt_tos to rt_key_tos.

To more accurately reflect that it is purely a routing
cache lookup key and is used in no other context.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c
index 59b1340..7ff973b 100644
--- a/net/ipv4/xfrm4_policy.c
+++ b/net/ipv4/xfrm4_policy.c
@@ -73,7 +73,7 @@
 
 	rt->rt_key_dst = fl4->daddr;
 	rt->rt_key_src = fl4->saddr;
-	rt->rt_tos = fl4->flowi4_tos;
+	rt->rt_key_tos = fl4->flowi4_tos;
 	rt->rt_route_iif = fl4->flowi4_iif;
 	rt->rt_iif = fl4->flowi4_iif;
 	rt->rt_oif = fl4->flowi4_oif;