The rss variant should conflict with the default.
Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>
Link: https://github.com/openwrt/openwrt/pull/16460
(cherry picked from b83c7448d3ecd82d6c9e02aded784d6bc3c9ce3c)
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>