1. Update CPUStatus to CpuStatus in comments to align comments
with code.
2. Add "OUT" attribute for "ProcedureArguments" parameter in function
header.
Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Shenglei Zhang <shenglei.zhang@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>