MdeModulePkg/EhciPei: Use BaseLib linked list iteration macros

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=1959

Replaces usage of the linked list iteration macros defined in EhcPeim.h
with the common definition in BaseLib.h.

Cc: Dandan Bi <dandan.bi@intel.com>
Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Sean Brogan <sean.brogan@microsoft.com>
Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>
Reviewed-by: Guomin Jiang <guomin.jiang@intel.com>
Reviewed-by: Hao A Wu <hao.a.wu@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Bret Barkelew <bret.barkelew@microsoft.com>

MdeModulePkg/Bus/Pci/EhciPei/EhciPei.inf

@@ -5,6 +5,7 @@
 # which is used to enable recovery function from USB Drivers.
 #
 # Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) Microsoft Corporation.<BR>
 #
 # SPDX-License-Identifier: BSD-2-Clause-Patent
 #
@@ -47,6 +48,7 @@
 [LibraryClasses]
   IoLib
   TimerLib
+  BaseLib
   BaseMemoryLib
   PeimEntryPoint
   PeiServicesLib