Currently, it is not clear how ras is supported. Both software and
hardware can set the supported. That is confusing.

Fix it by adding new member hw_supported.
Signed-off-by: Nxinhui pan <xinhui.pan@amd.com>
Reviewed-by: NEvan Quan <evan.quan@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>