REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3955 Currently, UPL freezed all PCD and only known UPL hob can hook DXE Drivers behavior, add optional feature on UniversalPayloadBuild.py to have another way to hook PCD value. Cc: Guo Dong <guo.dong@intel.com> Reviewed-by: : Ray Ni <ray.ni@intel.com> Signed-off-by: Gua Guo <gua.guo@intel.com>