drm/amdgpu: disable sienna chichlid UMC RAS

disable UMC RAS in lieu of stability issues on certain sku

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: John Clements <john.clements@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
John Clements 2020-09-24 22:20:31 +08:00 • committed by Alex Deucher
commit 265c280a48