drm/radeon: switch back to using the DMA ring for VM PT updates

Now that we have switched to using IBs for page table updates,
we can switch back the using the DMA ring.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2013-01-31 16:26:02 -05:00
commit df16004447