ipv6: Use flowi4->{daddr,saddr} in ipip6_tunnel_xmit().

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

net/ipv6/sit.c

@@ -828,8 +828,8 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb,
 	iph->frag_off		=	df;
 	iph->protocol		=	IPPROTO_IPV6;
 	iph->tos		=	INET_ECN_encapsulate(tos, ipv6_get_dsfield(iph6));
-	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	=	iph6->hop_limit;