Add TPM1.2 SaveState API.

Signed off by: Yao, Jiewen <Jiewen.yao@intel.com>
Reviewed by: Dong Guo <Gui.dong@intel.com>


git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14791 6f19259b-4bc3-4df7-8a09-765794883524

SecurityPkg/Include/Library/Tpm12CommandLib.h

@@ -31,6 +31,18 @@ Tpm12Startup (
   IN TPM_STARTUP_TYPE          TpmSt
   );
 
+/**
+  Send SaveState command to TPM1.2.
+
+  @retval EFI_SUCCESS      Operation completed successfully.
+  @retval EFI_DEVICE_ERROR Unexpected device behavior.
+**/
+EFI_STATUS
+EFIAPI
+Tpm12SaveState (
+  VOID
+  );
+
 /**
   Send ForceClear command to TPM1.2.