[][mac80211][wifi6][mt76][add support for realtime Rx rate updates]

[Description]
Add support for realtime Rx rate updates.

Currently, Rx rate is updated according to packet-triggered RxV
parsing flow, i.e., mt76_connac2_mac_fill_rx_rate(). However, whenever
the session enters hardware acceleration, driver layer won't have
any clue about what the current Rx rate is. So we make use of MCU
CMD to obtain Rx rate instead.

If without this patch, iw command might not show accurate Rx rate
after the traffic gets accelerated in hardware path.

[Release-log]
N/A


Change-Id: I9ec24334b72ced6eb9ad9aa76c1fbdc5f5e347d7
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8508713
1 file changed