REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3916 Basing on offline feedbacks to rename FspWrapperPlatformMultiPhaseLibSample to FspWrapperPlatformMultiPhaseLibNull. Cc: Nate DeSimone <nathaniel.l.desimone@intel.com> Cc: Star Zeng <star.zeng@intel.com> Signed-off-by: Chasel Chiu <chasel.chiu@intel.com> Reviewed-by: Nate DeSimone <nathaniel.l.desimone@intel.com>