UefiCpuPkg/CpuS3DataDxe: Consume PcdAcpiS3Enable to control the code

UefiCpuPkg/CpuS3DataDxe: Consume PcdAcpiS3Enable to control the code

If PcdAcpiS3Enable is disabled, then return an EFI_UNSUPPORTED
error which forces the module to be unloaded.

Cc: Jeff Fan <jeff.fan@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Michael Kinney <michael.d.kinney@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: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>