Getting GPIO to build again

[Jochen Friedrich]

Hi Anton,

> Though, with this patch:
> http://lkml.org/lkml/2008/7/10/269
> 
> We'll only have to select ARCH_WANT_OPTIONAL_GPIOLIB. Maybe for whole
> powerpc.

That would simplify the GPIO support patches for CPM1/2, as well.

Thanks,
Jochen