[][MAC80211][core][Conditionally skip bandwidth downgrading]

[Description]
Add the condition that checks the control channel before downgrading the bandwidth to avoid
undesirable channel downgrading

[Release-log]
N/A


Change-Id: I299ec185aff058d87e05742ca1693eac8f3e7967
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/6905448
1 file changed