Latest drm-next-4.9-wip is causing gfx kernel thread to be pegged 100% running piglit

[Shawn Starr]

Looks like something broke in drm-next-4.9-wip, unsure which change did.

When running: piglit tests/gpu summary/amdgpu 


Also triggers:
[ 1848.505498] [drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* ttm_eu_reserve_buffers 
failed.

Will test 4.8-rc6 vanilla to see if something broke there.

Thanks,
Shawn