[][MAC80211][WiFi7][misc][Extender: add support for channel switch]

[Description]
Add support for Extender channel switch.

[Release-log]
N/A

Change-Id: Ie1fcc9f04d08c8034dec09c32eb0baac8a35fe3c
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/9089513
1 file changed