drm/amdgpu: pad gfx and compute rings to 256 dw

The same as on windows to avoid further problems with CE/DE
command submission overlaps.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
3 files changed