MdeModulePkg: Source fixes and cleanup for ARMGCC compiles

- Fix EFI_IPv4_ADDRESS usages to use a macro to copy the structure
  instead of direct assignment, to avoid runtime alignment errors.
- Fix a EFI_INPUT_KEY usage in TerminalDxe to use CopyMem()  to copy the
   structure instead of direct assignment, to avoid runtime alignment error.
- Delete excess local variables that are initialized but otherwise unused.
- CompilerIntrinsicsLib library now imported for AARCH64, as well as ARM.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Randy Pawell <randy_pawell@hp.com>
Reviewed-by: Olivier Martin <Olivier.Martin@arm.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16471 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpressPassthru.c

@@ -2,6 +2,7 @@
   NvmExpressDxe driver is used to manage non-volatile memory subsystem which follows
   NVM Express specification.
 
+  (C) Copyright 2014 Hewlett-Packard Development Company, L.P.<BR>
   Copyright (c) 2013, 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
@@ -852,7 +853,6 @@ NvmExpressBuildDevicePath (
   IN OUT EFI_DEVICE_PATH_PROTOCOL                    **DevicePath
   )
 {
-  NVME_CONTROLLER_PRIVATE_DATA   *Private;
   NVME_NAMESPACE_DEVICE_PATH     *Node;
 
   //
@@ -862,8 +862,6 @@ NvmExpressBuildDevicePath (
     return EFI_INVALID_PARAMETER;
   }
 
-  Private = NVME_CONTROLLER_PRIVATE_DATA_FROM_PASS_THRU (This);
-
   if (NamespaceId == 0) {
     return EFI_NOT_FOUND;
   }