IntelFrameworkModulePkg AcpiS3SaveDxe: Consume PcdAcpiS3Enable to control the code

Cc: Jeff Fan <jeff.fan@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>

IntelFrameworkModulePkg/Universal/Acpi/AcpiS3SaveDxe/AcpiS3Save.c

@@ -605,8 +605,8 @@ S3Ready (
   @param ImageHandle   A handle for the image that is initializing this driver
   @param SystemTable   A pointer to the EFI system table
 
-  @retval EFI_SUCCESS:              Driver initialized successfully
-  @retval EFI_LOAD_ERROR:           Failed to Initialize or has been loaded
+  @retval EFI_SUCCESS               Driver initialized successfully
+  @retval EFI_UNSUPPORTED           Do not support ACPI S3
   @retval EFI_OUT_OF_RESOURCES      Could not allocate needed resources
 
 **/
@@ -619,6 +619,10 @@ InstallAcpiS3Save (
 {
   EFI_STATUS        Status;
 
+  if (!PcdGetBool (PcdAcpiS3Enable)) {
+    return EFI_UNSUPPORTED;
+  }
+
   if (!FeaturePcdGet(PcdPlatformCsmSupport)) {
     //
     // More memory for no CSM tip, because GDT need relocation