MdeModulePkg: SmmSmiHandlerProfileLib: Support StandaloneMm Instance

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3185

This change added support of SMI handler profile library router under
StandaloneMm. This change replaces gSmst with gMmst. It also abstracts
standalone and traditional MM driver entrypoints into separate files to
allow maximal common implementations.

Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>

Signed-off-by: Kun Qin <kun.q@outlook.com>
Reviewed-by: Hao A Wu <hao.a.wu@intel.com>

MdeModulePkg/Library/SmmSmiHandlerProfileLib/StandaloneMmSmiHandlerProfileLib.inf

@@ -0,0 +1,44 @@
+## @file
+# Standalone MM driver instance of SmiHandlerProfile Library.
+#
+# This library instance provides real functionality for SmmChildDispatcher module.
+#
+#  Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) Microsoft Corporation.
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = StandaloneMmSmiHandlerProfileLib
+  FILE_GUID                      = 1F2ED27B-A01D-4867-B993-9B710E5926C5
+  MODULE_TYPE                    = MM_STANDALONE
+  VERSION_STRING                 = 1.0
+  PI_SPECIFICATION_VERSION       = 0x10000032
+  LIBRARY_CLASS                  = SmiHandlerProfileLib|MM_STANDALONE
+  CONSTRUCTOR                    = StandaloneMmSmiHandlerProfileLibConstructor
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64
+#
+
+[Sources]
+  MmSmiHandlerProfileLib.c
+  MmSmiHandlerProfileLib.h
+  StandaloneMmSmiHandlerProfileLib.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+
+[LibraryClasses]
+  MmServicesTableLib
+
+[Guids]
+  gSmiHandlerProfileGuid  ## CONSUMES   ## GUID # Locate protocol
+