[][MAC80211][WiFi6][mt76][Add mt7981 mt7916 mt7915 fw_wm_info support]

[Description]
Add mt7981 mt7916 mt7915 fw_wm_info support

[Release-log]

Change-Id: I9dcfc5251b72bca5da343f22c00744f07d5e9e78
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8296933
2 files changed