MdeModulePkg: Add UFS (Universal Flash Storage) Stack

It includes 4 drivers:
1. UfsPassThruDxe, which is a UEFI driver and consumes EFI_UFS_HOST_CONTROLLER_PROTOCOL and produces EFI_EXT_SCSI_PASS_THRU_PROTOCOL
2. UfsPciHcDxe, which is specific for pci-based UFS HC implementation and is a UEFI driver to produce EFI_UFS_HOST_CONTROLLER_PROTOCOL.
3. UfsBlockIoPei, which is a PEI driver and consumes EFI_UFS_HOST_CONTROLLER_PPI and produces EFI_PEI_VIRTUAL_BLOCK_IO_PPI.
4. UfsPciHcPei, which is specific for pci-based UFS HC implementation and is a PEI driver to produce EFI_UFS_HOST_CONTROLLER_PPI.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Feng Tian <feng.tian@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17246 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Bus/Pci/UfsPciHcDxe/UfsPciHcDxe.inf

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+## @file
+#  Component Description File For Universal Flash Storage Pci Host Controller Module.
+#
+#  Copyright (c) 2014 - 2015, Intel Corporation. All rights reserved.<BR>
+#
+#  This program and the accompanying materials
+#  are licensed and made available under the terms and conditions of the BSD License
+#  which accompanies this distribution. The full text of the license may be found at
+#  http://opensource.org/licenses/bsd-license.php.
+#  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = UfsPciHcDxe
+  MODULE_UNI_FILE                = UfsPciHcDxe.uni
+  FILE_GUID                      = AF43E178-C2E9-4712-A7CD-08BFDAC7482C
+  MODULE_TYPE                    = UEFI_DRIVER
+  VERSION_STRING                 = 0.9
+  ENTRY_POINT                    = UfsHcDriverEntry
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64 IPF EBC
+#
+#  DRIVER_BINDING                =  gUfsHcDriverBinding
+#  COMPONENT_NAME                =  gUfsHcComponentName
+#  COMPONENT_NAME2               =  gUfsHcComponentName2
+
+[Sources]
+  ComponentName.c
+  UfsPciHcDxe.c
+  UfsPciHcDxe.h
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+
+[LibraryClasses]
+  BaseLib
+  DebugLib
+  DevicePathLib
+  UefiDriverEntryPoint
+  UefiBootServicesTableLib
+  UefiLib
+
+[Protocols]
+  gEfiPciIoProtocolGuid                       ## TO_START
+  gEfiDevicePathProtocolGuid                  ## TO_START
+  gEdkiiUfsHostControllerProtocolGuid         ## BY_START
+
+[UserExtensions.TianoCore."ExtraFiles"]
+  UfsPciHcDxeExtra.uni