PCI Radeon RV100 detection hang on sparc64

[mroos at linux.ee]

> we should just skip the igp reading function on not-x86, since IGP on
> not x86 makes no sense.

I #ifdef'ed out the igp part with CONFIG_X86. This time it got to
[drm] radeon: ring at 0x000001FF0C002000
and stopped here. Some printks showed the actual hang happens in
radeon_ring_commit() with the line

(void)RREG32(ring->wptr_reg);

Any ideas where to continue here?

-- 
Meelis Roos (mroos at linux.ee)