ArmVirtPkg/TPM: Add a NULL implementation of TpmPlatformHierarchyLib

Add a NULL implementation of the library class TpmPlatformHierarchyLib.

Link: https://bugzilla.tianocore.org/show_bug.cgi?id=3510
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Leif Lindholm <leif@nuviainc.com>
Cc: Sami Mujawar <sami.mujawar@arm.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>

SecurityPkg/Library/PeiDxeTpmPlatformHierarchyLibNull/PeiDxeTpmPlatformHierarchyLib.c

@@ -0,0 +1,22 @@
+/** @file
+    Null TPM Platform Hierarchy configuration library.
+
+    This library provides stub functions for customizing the TPM's Platform Hierarchy.
+
+    Copyright (c) 2021, IBM Corporation.
+    SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Uefi.h>
+
+/**
+  A NULL implementation of ConfigureTpmPlatformHierarchy.
+**/
+VOID
+EFIAPI
+ConfigureTpmPlatformHierarchy (
+  )
+{
+  /* do nothing */
+}