[][MAC80211][app][Add vendor command attribute for RTS BW signaling for mt76.]

[Description]
Add vendor command attribute for RTS BW signaling for mt76.

[Release-log]

Change-Id: I7fa0df909ed65492a33505c120b726a87b44c8f2
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7069417
2 files changed