NetworkPkg: 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.
- Delete excess local variables that are initialized but otherwise unused.
- Add LibraryClasses.ARM & AARCH64 section in NetworkPkg.dsc file,
   containing a CompilerIntrinsicsLib null-library, required for successful
  standalone package builds (copied from MdeModulePkg.dsc).

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Randy Pawell <randy_pawell@hp.com>
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>
Reviewed-by: Ye Ting <ting.ye@intel.com>


git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16472 6f19259b-4bc3-4df7-8a09-765794883524

NetworkPkg/NetworkPkg.dsc

@@ -1,6 +1,7 @@
 ## @file
 # UEFI 2.4 Network Module Package for All Architectures
 #
+# (C) Copyright 2014 Hewlett-Packard Development Company, L.P.<BR>
 # Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>
 #
 #    This program and the accompanying materials
@@ -19,7 +20,7 @@
   PLATFORM_VERSION               = 0.95
   DSC_SPECIFICATION              = 0x00010005
   OUTPUT_DIRECTORY               = Build/NetworkPkg
-  SUPPORTED_ARCHITECTURES        = IA32|IPF|X64|EBC|ARM
+  SUPPORTED_ARCHITECTURES        = IA32|IPF|X64|EBC|ARM|AARCH64
   BUILD_TARGETS                  = DEBUG|RELEASE
   SKUID_IDENTIFIER               = DEFAULT
 
@@ -57,6 +58,14 @@
   SortLib|ShellPkg/Library/UefiSortLib/UefiSortLib.inf
   ShellLib|ShellPkg/Library/UefiShellLib/UefiShellLib.inf
 
+[LibraryClasses.ARM, LibraryClasses.AARCH64]
+  #
+  # It is not possible to prevent ARM compiler calls to generic intrinsic functions.
+  # This library provides the instrinsic functions generated by a given compiler.
+  # [LibraryClasses.ARM] and NULL mean link this library into all ARM images.
+  #
+  NULL|ArmPkg/Library/CompilerIntrinsicsLib/CompilerIntrinsicsLib.inf
+
 [PcdsFeatureFlag]
   gEfiMdePkgTokenSpaceGuid.PcdComponentName2Disable|TRUE
   gEfiMdePkgTokenSpaceGuid.PcdDriverDiagnostics2Disable|TRUE