net: Put flowi_* prefix on AF independent members of struct flowi

I intend to turn struct flowi into a union of AF specific flowi
structs.  There will be a common structure that each variant includes
first, much like struct sock_common.

This is the first step to move in that direction.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/xfrm6_state.c b/net/ipv6/xfrm6_state.c
index a02598e..805d0e1 100644
--- a/net/ipv6/xfrm6_state.c
+++ b/net/ipv6/xfrm6_state.c
@@ -33,8 +33,8 @@
 	sel->family = AF_INET6;
 	sel->prefixlen_d = 128;
 	sel->prefixlen_s = 128;
-	sel->proto = fl->proto;
-	sel->ifindex = fl->oif;
+	sel->proto = fl->flowi_proto;
+	sel->ifindex = fl->flowi_oif;
 }
 
 static void