UPD allocation and patching can be done outside FspWrapper as implementation choice so adding a PCD to select between original FspWrapper allocation model or outside model Cc: Jiewen Yao <Jiewen.yao@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Chasel Chiu <chasel.chiu@intel.com> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>