openvswitch: correct encoding of set tunnel action attributes

In a set action tunnel attributes should be encoded in a
nested action.

I noticed this because ovs-dpctl was reporting an error
when dumping flows due to the incorrect encoding of tunnel attributes
in a set action.

Fixes: fc4099f1 ("openvswitch: Fix egress tunnel info.")
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/openvswitch/flow_netlink.c

@@ -2434,7 +2434,10 @@ static int set_action_to_attr(const struct nlattr *a, struct sk_buff *skb)
 		if (!start)
 			return -EMSGSIZE;
 
-		err = ovs_nla_put_tunnel_info(skb, tun_info);
+		err =  ip_tun_to_nlattr(skb, &tun_info->key,
+					ip_tunnel_info_opts(tun_info),
+					tun_info->options_len,
+					ip_tunnel_info_af(tun_info));
 		if (err)
 			return err;
 		nla_nest_end(skb, start);