[Gta04-owner] Small update to 3.7-gta04 kernel: faster wifi.

[NeilBrown]

I've just pushed out a small update to 3.7-gta04.

This update adds support for the IRQ line from SDIO cards, such as the wifi
in the gta04.
This allows the wifi to go faster.
With polling (the old behaviour) I get about 1Mb/sec
With Interupts enabled and polling disabled I get about 4Mb/sec.
If I have interrupts *and* polling (which admittedly is a strange
config to even try) I get 5Mb/sec on my 800MHz board, and 6Mb/sec on
my 1GHz board.

So the code currently does both.  It is a bit of a hack (and not the only
hack) but it works OK for now.

This is will well short of the 40Mb/sec my notebook gets!
So it is an improvement, but not as much as I had hoped.

NeilBrown
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