drm/amdgpu: only harvest gcea/mmea error status in aldebaran

In aldebaran, driver only needs to harvest SDP
RdRspStatus, WrRspStatus and first parity error
on RdRsp data. Check error type before harvest
error information.

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Stanley Yang <Stanley.Yang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>