MdePkg/Library/UefiDevicePathLib: Add back StandaloneMm INF file

REF: https://github.com/tianocore/edk2/pull/3130

The above PR removed UefiDevicePathLibStandaloneMm.inf, which is
a non-backwards compatible change and does not provide time for
downstream platforms to use the UefiDevicePathLibBase.inf.

Add UefiDevicePathLibStandaloneMm.inf back, but add comments that
it is deprecated and that UefiDevicePathLibBase.inf should be used
instead.

Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Cc: Mateusz Albecki <mateusz.albecki@intel.com>
Cc: Yanbo Huang <yanbo.huang@intel.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>

MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibStandaloneMm.inf

@@ -0,0 +1,78 @@
+## @file
+# Instance of Device Path Library based on Memory Allocation Library.
+#
+# Device Path Library that layers on top of the Memory Allocation Library.
+#
+# This library instances is deprecated and should no longer be used.  Ue
+# MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibBase.inf instead.
+#
+# Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) Microsoft Corporation.
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = UefiDevicePathLibStandaloneMm
+  MODULE_UNI_FILE                = UefiDevicePathLib.uni
+  FILE_GUID                      = 7B60A2BC-9259-48A8-8279-971412EECAB3
+  MODULE_TYPE                    = BASE
+  PI_SPECIFICATION_VERSION       = 0x00010032
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = DevicePathLib
+
+
+#
+#  VALID_ARCHITECTURES           = IA32 X64 EBC
+#
+
+[Sources]
+  DevicePathUtilities.c
+  DevicePathUtilitiesBase.c
+  DevicePathToText.c
+  DevicePathFromText.c
+  UefiDevicePathLib.c
+  UefiDevicePathLib.h
+
+[Packages]
+  MdePkg/MdePkg.dec
+
+[LibraryClasses]
+  BaseLib
+  MemoryAllocationLib
+  DebugLib
+  BaseMemoryLib
+  PcdLib
+  PrintLib
+
+[Guids]
+  ## SOMETIMES_CONSUMES  ## GUID
+  gEfiVTUTF8Guid
+  ## SOMETIMES_CONSUMES  ## GUID
+  gEfiVT100Guid
+  ## SOMETIMES_CONSUMES  ## GUID
+  gEfiVT100PlusGuid
+  ## SOMETIMES_CONSUMES  ## GUID
+  gEfiPcAnsiGuid
+  ## SOMETIMES_CONSUMES  ## GUID
+  gEfiUartDevicePathGuid
+  ## SOMETIMES_CONSUMES  ## GUID
+  gEfiSasDevicePathGuid
+  ## SOMETIMES_CONSUMES  ## GUID
+  gEfiVirtualDiskGuid
+  ## SOMETIMES_CONSUMES  ## GUID
+  gEfiVirtualCdGuid
+  ## SOMETIMES_CONSUMES  ## GUID
+  gEfiPersistentVirtualDiskGuid
+  ## SOMETIMES_CONSUMES  ## GUID
+  gEfiPersistentVirtualCdGuid
+
+[Protocols]
+  gEfiDevicePathProtocolGuid                    ## SOMETIMES_CONSUMES
+  gEfiDebugPortProtocolGuid                     ## UNDEFINED
+
+[Pcd]
+  gEfiMdePkgTokenSpaceGuid.PcdMaximumDevicePathNodeCount    ## SOMETIMES_CONSUMES

MdePkg/MdePkg.dsc

@@ -112,6 +112,7 @@
   MdePkg/Library/UefiDebugLibStdErr/UefiDebugLibStdErr.inf
   MdePkg/Library/UefiDevicePathLib/UefiDevicePathLib.inf
   MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibBase.inf
+  MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibStandaloneMm.inf
   MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePathProtocol.inf
   MdePkg/Library/UefiDevicePathLibDevicePathProtocol/UefiDevicePathLibDevicePathProtocol.inf
   MdePkg/Library/UefiDriverEntryPoint/UefiDriverEntryPoint.inf