Usbvision/i2c-algo-usb port to 2.8.0

[Jean Delvare]

> I picked up most from the kernel patch
> (http://www.ensicaen.ismra.fr/~delvare/devel/i2c/linux-2.4.21-i2c-2.8
> .0.patch), in which you also leave out algo_control in your patch for
> i2c-algo-bit.c;

(Just took a deeper look at the code.)

That's because it was unused for that particular algorithm. But it is
still used for two other algorithms: ibm_ocp and iop3xx (not build by
default). So if i2c-algo-usb was using it, I think we have to leave it
there.

-- 
Jean Delvare
http://www.ensicaen.ismra.fr/~delvare/