tc: Set action flags for tunnel_key release.

The commit that enabled 'no_percpu' flag for compatible actions missed the
tunnel_key release action code. Add missing call to nl_msg_put_act_flags().

Fixes: 292d5bd ("tc: Set 'no_percpu' flag for compatible actions")
Reported-by: Marcelo Ricardo Leitner <mleitner@redhat.com>
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Tested-by: Marcelo Ricardo Leitner <mleitner@redhat.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>

lib/tc.c

@@ -2638,6 +2638,7 @@ nl_msg_put_flower_acts(struct ofpbuf *request, struct tc_flower *flower)
                 if (!released && flower->tunnel) {
                     act_offset = nl_msg_start_nested(request, act_index++);
                     nl_msg_put_act_tunnel_key_release(request);
+                    nl_msg_put_act_flags(request);
                     nl_msg_end_nested(request, act_offset);
                     released = true;
                 }