drm/amdgpu: disable sienna chichlid UMC RAS

disable UMC RAS in lieu of stability issues on certain sku
Reviewed-by: NHawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: NJohn Clements <john.clements@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c

@@ -2008,8 +2008,7 @@ static int amdgpu_ras_check_asic_type(struct amdgpu_device *adev)
 {
 	if (adev->asic_type != CHIP_VEGA10 &&
 		adev->asic_type != CHIP_VEGA20 &&
-		adev->asic_type != CHIP_ARCTURUS &&
-		adev->asic_type != CHIP_SIENNA_CICHLID)
+		adev->asic_type != CHIP_ARCTURUS)
 		return 1;
 	else
 		return 0;
@@ -2053,6 +2052,7 @@ static void amdgpu_ras_check_supported(struct amdgpu_device *adev,
 
 	*supported = amdgpu_ras_enable == 0 ?
 			0 : *hw_supported & amdgpu_ras_mask;
+
 	adev->ras_features = *supported;
 }