MdeModulePkg: Add more PciHostBridgeLib gmock support

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4443

Add Google Mock Library for PciHostBridgeLib

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Chris Johnson <chris.n.johnson@intel.com>
Signed-off-by: Gua Guo <gua.guo@intel.com>
Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>

MdeModulePkg/Test/Mock/Include/GoogleTest/Library/MockPciHostBridgeLib.h

@@ -0,0 +1,40 @@
+/** @file
+  Google Test mocks for PciHostBridgeLib
+
+  Copyright (c) 2023, Intel Corporation. All rights reserved.
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#ifndef MOCK_PCI_HOST_BRIDGE_LIB_H_
+#define MOCK_PCI_HOST_BRIDGE_LIB_H_
+
+#include <Library/GoogleTestLib.h>
+#include <Library/FunctionMockLib.h>
+extern "C" {
+#include <Uefi.h>
+#include <Library/PciHostBridgeLib.h>
+}
+
+struct MockPciHostBridgeLib {
+  MOCK_INTERFACE_DECLARATION (MockPciHostBridgeLib);
+
+  MOCK_FUNCTION_DECLARATION (
+    PCI_ROOT_BRIDGE *,
+    PciHostBridgeGetRootBridges,
+    (UINTN  *Count)
+    );
+  MOCK_FUNCTION_DECLARATION (
+    VOID,
+    PciHostBridgeFreeRootBridges,
+    (PCI_ROOT_BRIDGE  *Bridges,
+     UINTN            Count)
+    );
+  MOCK_FUNCTION_DECLARATION (
+    VOID,
+    PciHostBridgeResourceConflict,
+    (EFI_HANDLE  HostBridgeHandle,
+     VOID        *Configuration)
+    );
+};
+
+#endif