NetworkPkg: Clean up source files

1. Do not use tab characters
2. No trailing white space in one line
3. All files must end with CRLF

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Liming Gao <liming.gao@intel.com>

NetworkPkg/Udp6Dxe/Udp6Impl.h

@@ -1,7 +1,7 @@
 /** @file
   Udp6 driver's whole implementation and internal data structures.
 
-  Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2009 - 2018, 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
@@ -144,7 +144,7 @@ Udp6CreateService (
   IN EFI_HANDLE         ImageHandle,
   IN EFI_HANDLE         ControllerHandle
   );
- 
+
 /**
   This function cleans the udp instance.
 
@@ -155,7 +155,7 @@ VOID
 Udp6CleanInstance (
   IN OUT UDP6_INSTANCE_DATA  *Instance
   );
- 
+
 /**
   This function intializes the new created udp instance.