Platform can configure the PCD statically or dynamically to control if ACPI S3 will be enabled. S3 related modules can consume the PCD to control the code. Cc: Feng Tian <feng.tian@intel.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Laszlo Ersek <lersek@redhat.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Star Zeng <star.zeng@intel.com> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com> Tested-by: Laszlo Ersek <lersek@redhat.com>