Userspace handling is deprecated. MAC address stuff needs to remain
handled in userspace as it's encrypted. Maybe an NVMEM driver can be
written in the future...
Signed-off-by: Rosen Penev <rosenp@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/17276
Signed-off-by: Robert Marko <robimarko@gmail.com>