MdeModulePkg: ReportStatusCodeRouter: Support StandaloneMm RSC Router

This change added support of RSC router under StandaloneMm. It replaces
SMM version ReportStatusCode protocol definitions with MM version. This
patch also switched to use gMmst instead of gSmst. Lastly, it 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: Dandan Bi <dandan.bi@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>

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

MdeModulePkg/Universal/ReportStatusCodeRouter/Smm/ReportStatusCodeRouterStandaloneMm.inf

@@ -0,0 +1,49 @@
+## @file
+#  Report Status Code Router Driver which produces MM Report Stataus Code Handler Protocol and MM Status Code Protocol.
+#
+#  Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) Microsoft Corporation.
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = ReportStatusCodeRouterStandaloneMm
+  FILE_GUID                      = EAEEDEF9-ABE7-4B95-82B0-5A534C899B46
+  MODULE_TYPE                    = MM_STANDALONE
+  PI_SPECIFICATION_VERSION       = 0x00010032
+  VERSION_STRING                 = 1.0
+  ENTRY_POINT                    = GenericStatusCodeStandaloneMmEntry
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64
+#
+
+[Sources]
+  ReportStatusCodeRouterCommon.c
+  ReportStatusCodeRouterCommon.h
+  ReportStatusCodeRouterStandaloneMm.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+
+[LibraryClasses]
+  MmServicesTableLib
+  StandaloneMmDriverEntryPoint
+  DebugLib
+  BaseLib
+  SynchronizationLib
+  MemoryAllocationLib
+
+[Protocols]
+  gEfiMmRscHandlerProtocolGuid               ## PRODUCES
+  gEfiMmStatusCodeProtocolGuid               ## PRODUCES
+
+[Depex]
+  TRUE