[][MAC80211][WiFi6][mt76][Add support for WMM PBC configuration]

[Description]
Add support for WMM PBC configuration.
Specifically, query per-AC-queue packet statistics from WA, and determine if multi-AC transmission is ongoing.
If it is, enable WMM mode in WA. Otherwise, disable WMM mode.

[Release-log]
N/A

Change-Id: Ie31fcae751fbde3480edc7038af2fba666f63347
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8608076
1 file changed