SecurityPkg: Tcg2Smm: Added support for Standalone Mm

https://bugzilla.tianocore.org/show_bug.cgi?id=3169

This change added Standalone MM instance of Tcg2. The notify function for
Standalone MM instance is left empty.

A dependency DXE driver with a Depex of gEfiMmCommunication2ProtocolGuid
was created to indicate the readiness of Standalone MM Tcg2 driver.

Lastly, the support of CI build for Tcg2 Standalone MM module is added.

Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Qi Zhang <qi1.zhang@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>

Signed-off-by: Kun Qin <kun.q@outlook.com>
Reviewed-by: Jiewen Yao <Jiewen.yao@intel.com>
Message-Id: <MWHPR06MB3102C3F99CBADFCC5F8A821CF3969@MWHPR06MB3102.namprd06.prod.outlook.com>

SecurityPkg/Tcg/Tcg2Smm/Tcg2MmDependencyDxe.c

@@ -0,0 +1,48 @@
+/** @file
+  Runtime DXE part corresponding to StandaloneMM Tcg2 module.
+
+This module installs gTcg2MmSwSmiRegisteredGuid to notify readiness of
+StandaloneMM Tcg2 module.
+
+Copyright (c) 2019 - 2021, Arm Ltd. All rights reserved.
+Copyright (c) Microsoft Corporation.
+
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <PiDxe.h>
+
+#include <Library/DebugLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+
+/**
+  The constructor function installs gTcg2MmSwSmiRegisteredGuid to notify
+  readiness of StandaloneMM Tcg2 module.
+
+  @param  ImageHandle   The firmware allocated handle for the EFI image.
+  @param  SystemTable   A pointer to the Management mode System Table.
+
+  @retval EFI_SUCCESS   The constructor always returns EFI_SUCCESS.
+
+**/
+EFI_STATUS
+EFIAPI
+Tcg2MmDependencyDxeEntryPoint (
+  IN EFI_HANDLE                           ImageHandle,
+  IN EFI_SYSTEM_TABLE                     *SystemTable
+  )
+{
+  EFI_STATUS            Status;
+  EFI_HANDLE            Handle;
+
+  Handle = NULL;
+  Status = gBS->InstallProtocolInterface (
+                  &Handle,
+                  &gTcg2MmSwSmiRegisteredGuid,
+                  EFI_NATIVE_INTERFACE,
+                  NULL
+                  );
+  ASSERT_EFI_ERROR (Status);
+  return EFI_SUCCESS;
+}