drm/amdgpu: Disable fru_id field in CPER section

The fru_id field is disabled cause of mis-matching defination
between CPER spec and driver.

Signed-off-by: Xiang Liu <xiang.liu@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>