feature mask info is enough for rocm tool,
"cat /sys/class/drm/card0/device/ras/features" will get the
info like this:

feature mask: 0x3ffb
Signed-off-by: NTao Zhou <tao.zhou1@amd.com>
Reviewed-by: NHawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>