Revert "DebugUsb3: Support IOMMU"

This reverts commit de8373fa07.

Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Hao Wu <hao.a.wu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Hao Wu <hao.a.wu@intel.com>
(cherry picked from commit 1f279e7a53)

SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Dxe.inf

@@ -1,7 +1,7 @@
 ## @file
 #  Debug Communication Library instance based on usb3 debug port.
 #
-#  Copyright (c) 2014 - 2018, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2014 - 2017, 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
@@ -21,8 +21,6 @@
   MODULE_TYPE                    = DXE_DRIVER
   VERSION_STRING                 = 1.0
   LIBRARY_CLASS                  = DebugCommunicationLib|DXE_CORE DXE_DRIVER DXE_RUNTIME_DRIVER DXE_SAL_DRIVER DXE_SMM_DRIVER UEFI_APPLICATION UEFI_DRIVER SMM_CORE
-  CONSTRUCTOR                    = DebugCommunicationUsb3DxeConstructor
-  DESTRUCTOR                     = DebugCommunicationUsb3DxeDestructor
 
 #
 # The following information is for reference only and not required by the build tools.
@@ -56,11 +54,7 @@
 
   # The value of data buffer size used for USB debug port handle.
   # It should be equal to sizeof (USB3_DEBUG_PORT_HANDLE).
-  gEfiSourceLevelDebugPkgTokenSpaceGuid.PcdDebugPortHandleBufferSize|250   ## SOMETIMES_CONSUMES
-
-[Protocols]
-  gEfiPciIoProtocolGuid                 ## CONSUMES
-  gEdkiiIoMmuProtocolGuid               ## CONSUMES
+  gEfiSourceLevelDebugPkgTokenSpaceGuid.PcdDebugPortHandleBufferSize|239   ## SOMETIMES_CONSUMES
 
 [LibraryClasses]
   BaseLib
@@ -71,4 +65,4 @@
   UefiBootServicesTableLib
   UefiLib
   BaseMemoryLib
-  HobLib
+