[Cherry-Pick] Declare mock SMM Access2 Protocol. (#1177)

Declare mock SMM Access2 Protocol for google test.

- [ ] Impacts functionality?
- [ ] Impacts security?
- [ ] Breaking change?
- [ ] Includes tests?
- [ ] Includes documentation?

Run the google test.

N/A

MdePkg/Test/Mock/Include/GoogleTest/Protocol/MockSmmAccess2.h

@@ -0,0 +1,68 @@
+/** @file MockSmmAccess2.h
+  Declare mock SMM Access2 Protocol.
+
+  Copyright (c) Microsoft Corporation.
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#ifndef MOCK_SMM_ACCESS2_H_
+#define MOCK_SMM_ACCESS2_H_
+
+#include <Library/GoogleTestLib.h>
+#include <Library/FunctionMockLib.h>
+extern "C" {
+  #include <Uefi.h>
+  #include <Pi/PiMultiPhase.h>
+  #include <Protocol/SmmAccess2.h>
+}
+
+struct MockSmmAccess2Protocol {
+  MOCK_INTERFACE_DECLARATION (MockSmmAccess2Protocol);
+
+  MOCK_FUNCTION_DECLARATION (
+    EFI_STATUS,
+    Open,
+    (IN EFI_MM_ACCESS_PROTOCOL  *This)
+    );
+
+  MOCK_FUNCTION_DECLARATION (
+    EFI_STATUS,
+    Close,
+    (IN EFI_MM_ACCESS_PROTOCOL  *This)
+    );
+
+  MOCK_FUNCTION_DECLARATION (
+    EFI_STATUS,
+    Lock,
+    (IN EFI_MM_ACCESS_PROTOCOL  *This)
+    );
+
+  MOCK_FUNCTION_DECLARATION (
+    EFI_STATUS,
+    GetCapabilities,
+    (IN CONST EFI_MM_ACCESS_PROTOCOL    *This,
+     IN OUT UINTN                       *MmramMapSize,
+     IN OUT EFI_MMRAM_DESCRIPTOR        *MmramMap)
+    );
+};
+
+MOCK_INTERFACE_DEFINITION (MockSmmAccess2Protocol);
+MOCK_FUNCTION_DEFINITION (MockSmmAccess2Protocol, Open, 1, EFIAPI);
+MOCK_FUNCTION_DEFINITION (MockSmmAccess2Protocol, Close, 1, EFIAPI);
+MOCK_FUNCTION_DEFINITION (MockSmmAccess2Protocol, Lock, 1, EFIAPI);
+MOCK_FUNCTION_DEFINITION (MockSmmAccess2Protocol, GetCapabilities, 3, EFIAPI);
+
+EFI_SMM_ACCESS2_PROTOCOL  SMM_ACCESS2_PROTOCOL_INSTANCE = {
+  Open,
+  Close,
+  Lock,
+  GetCapabilities,
+  FALSE,
+  FALSE
+};
+
+extern "C" {
+  EFI_SMM_ACCESS2_PROTOCOL  *gSmmAccess2Protocol = &SMM_ACCESS2_PROTOCOL_INSTANCE;
+}
+
+#endif