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/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c
index c70c42e..4294f12 100644
--- a/net/ipv4/xfrm4_policy.c
+++ b/net/ipv4/xfrm4_policy.c
@@ -73,9 +73,9 @@
 	rt->rt_key_dst = fl->fl4_dst;
 	rt->rt_key_src = fl->fl4_src;
 	rt->rt_tos = fl->fl4_tos;
-	rt->rt_iif = fl->iif;
-	rt->rt_oif = fl->oif;
-	rt->rt_mark = fl->mark;
+	rt->rt_iif = fl->flowi_iif;
+	rt->rt_oif = fl->flowi_oif;
+	rt->rt_mark = fl->flowi_mark;
 
 	xdst->u.dst.dev = dev;
 	dev_hold(dev);
@@ -104,7 +104,7 @@
 	u8 *xprth = skb_network_header(skb) + iph->ihl * 4;
 
 	memset(fl, 0, sizeof(struct flowi));
-	fl->mark = skb->mark;
+	fl->flowi_mark = skb->mark;
 
 	if (!(iph->frag_off & htons(IP_MF | IP_OFFSET))) {
 		switch (iph->protocol) {
@@ -173,7 +173,7 @@
 			break;
 		}
 	}
-	fl->proto = iph->protocol;
+	fl->flowi_proto = iph->protocol;
 	fl->fl4_dst = reverse ? iph->saddr : iph->daddr;
 	fl->fl4_src = reverse ? iph->daddr : iph->saddr;
 	fl->fl4_tos = iph->tos;