The plumbing is there in the ucode files to set the parameter using
nl80211. However, the option is never forwarded because it was missing
in mac80211.sh. Add it there and in the schema file.
Signed-off-by: Benjamin Berg <benjamin@sipsolutions.net>
Link: https://github.com/openwrt/openwrt/pull/19030
Signed-off-by: Robert Marko <robimarko@gmail.com>