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/Universal/CapsulePei/Common/CapsuleCoalesce.c

@@ -9,6 +9,7 @@
   CapsuleDataCoalesce() will do basic validation before coalesce capsule data
   into memory.
 
+(C) Copyright 2014 Hewlett-Packard Development Company, L.P.<BR>
 Copyright (c) 2011 - 2014, 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
@@ -960,7 +961,6 @@ CapsuleDataCoalesce (
   UINT8                          *DestPtr;
   UINTN                          DestLength;
   UINT8                          *RelocPtr;
-  UINT64                         *AddDataPtr;
   UINTN                          CapsuleTimes; 
   UINT64                         SizeLeft; 
   UINT64                         CapsuleImageSize; 
@@ -986,7 +986,6 @@ CapsuleDataCoalesce (
   CapsuleTimes     = 0;
   CapsuleImageSize = 0;
   PrivateDataPtr   = NULL;
-  AddDataPtr       = NULL;
   CapsuleHeader    = NULL;
   CapsuleBeginFlag = TRUE;
   CapsuleSize      = 0;