[PATCH 21.02] mwlwifi: downgrade the 88W8964's firmware to 9.3.2.6 to prevent instability

[Arınç ÜNAL]

> On Sat, Jul 24, 2021 at 6:40 PM Hauke Mehrtens <hauke at hauke-m.de> wrote:
>> 
>>> On 7/22/21 6:54 PM, Arınç ÜNAL wrote:
>>> Avoid 88W8964 firmware 9.3.2.12 for Wi-Fi instabilities it causes on Linksys WRT3200ACM & WRT32X until fixes on master branch are backported to openwrt-21.02.
>> 
>> Which changes in master which are not backported are fixing this problem?
> 
> I don't know the specific commits, however, me and @rmandrad on GitHub
> under this PR (https://github.com/openwrt/openwrt/pull/4381) tried the
> master branch which includes the 9.3.2.12 firmware. Wireless works
> fine without any cut-out issues.
> We suspect it's the changes on the wireless stack (mac80211) that were
> not backported to openwrt-21.02 branch.