Can we upgrade staging/at76_usb

[Karl Relton]

As per comments in

https://bugs.launchpad.net/bugs/152626

the code in Jaunty for staging/at76_usb seems to be a snapshot of
upstream circa 2.6.29-rc4, which has bugs.

To use this driver (rather than ubuntu/misc/wireless/at76_usb which is
old and doesn't work for people) we should either sync to upstream
2.6.28.8 or sync to upstream 2.6.29-rc8. I've tested the latter on my
system, and it works okay with my at76c503 based card.

Regards
Karl