b43: ac rev1 captured packets with ampdu

[Alessio Ferri]

Hi Andreas,
i captured some tx/rx packets in transit using ampdu with my vd625
(bcm4360 3x3), some packets with 2 HT streams and some with 1 HT stream
at various bandwith, all 5Ghz, if you want to look at them. They are in
my repo under router-data/vd625-agcombo/{rxtx-1s-h20-40-80,
rxtx-2s-ht20-40-80, rxtx-1s-ht-ampdu}.
I still figuring even-length ssid problems and testing ht modes.
Hope to finish soon to then tackle ampdu fully.

Have a nice day
Alessio