Keep mach64 pci only

[Benjamin Herrenschmidt]

> The attached patchset drops support for pre-mach64 and non-pci cards from 
> xf86-video-ati. Is it based on the work by Luc Verhaegen. I think it is 
> acceptable because (with a bit of salt :-) the only effective functionality 
> loss should be mach32 video modes and it facilitates pci-rework porting of 
> atimisc and the ati wrapper. The branch has been tested only on a 
> RagePro/i386.
> 
> So, speak if you have strong reasons not to merge the branch. Also, ideally 
> it should be tested on some other card/arch before merging, so please test 
> if possible. In the absence of testing, I'll probably merge the first half 
> of the branch now and the rest in due time.

Isn't sparc at least using mach64 non PCI ?

Ben.