drm/amdgpu/gfx8: use cached values for raster config in clear state

Use the cached values rather than hardcoding it.

Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2017-11-13 15:42:57 -05:00
commit 93442184c0