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>

SourceLevelDebugPkg/Library/DebugCommunicationLibUsb3/DebugCommunicationLibUsb3Pei.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
@@ -41,7 +41,6 @@
 
 [Ppis]
   gEfiPeiMemoryDiscoveredPpiGuid                ## CONSUMES
-  gEdkiiIoMmuPpiGuid                            ## CONSUMES
 
 [Pcd]
   # The memory BAR of ehci host controller, in which usb debug feature is enabled.
@@ -58,7 +57,7 @@
 
   # 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
+  gEfiSourceLevelDebugPkgTokenSpaceGuid.PcdDebugPortHandleBufferSize|239   ## SOMETIMES_CONSUMES
 
 [LibraryClasses]
   BaseLib
@@ -68,7 +67,6 @@
   TimerLib
   BaseMemoryLib
   PeiServicesLib
-  HobLib
-
+  
 [Depex.common.PEIM]
   gEfiPeiMemoryDiscoveredPpiGuid