ipv4: Use flowi4->{daddr,saddr} in ipip_tunnel_xmit().

Instead of rt->rt_{dst,src}
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/ipip.c

@@ -550,8 +550,8 @@ static netdev_tx_t ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
 	iph->frag_off		=	df;
 	iph->protocol		=	IPPROTO_IPIP;
 	iph->tos		=	INET_ECN_encapsulate(tos, old_iph->tos);
-	iph->daddr		=	rt->rt_dst;
-	iph->saddr		=	rt->rt_src;
+	iph->daddr		=	fl4.daddr;
+	iph->saddr		=	fl4.saddr;
 
 	if ((iph->ttl = tiph->ttl) == 0)
 		iph->ttl	=	old_iph->ttl;