[][MAC80211][mt76][Add txpower info dump support]

[Description]
Add txpower info dump support

[Release-log]
N/A

Change-Id: I6825c912e4891236fe49111c37d6c46f5127b3b8
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7729506
1 file changed