1. umc v12_0 logs ecc errors.
2. Reserve newly detected ecc error pages.
3. Add tag for bad pages, so that they can
   be retired later.
Signed-off-by: YiPeng Chai <YiPeng.Chai@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>