MdePkg: 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>

MdePkg/Include/Protocol/HttpBootCallback.h

@@ -1,7 +1,7 @@
 /** @file
   This file defines the EFI HTTP Boot Callback Protocol interface.
 
-  Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2017 - 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
   which accompanies this distribution. The full text of the license may be found at
@@ -43,7 +43,7 @@ typedef enum {
   ///
   HttpBootHttpRequest,
   ///
-  /// Data points to an EFI_HTTP_MESSAGE structure, which contians a received HTTP 
+  /// Data points to an EFI_HTTP_MESSAGE structure, which contians a received HTTP
   /// response message.
   ///
   HttpBootHttpResponse,
@@ -72,7 +72,7 @@ typedef enum {
   @param[in]  DataLength          The length in bytes of the buffer pointed to by Data.
   @param[in]  Data                A pointer to the buffer of data, the data type is specified by
                                   DataType.
-                                  
+
   @retval EFI_SUCCESS             Tells the HTTP Boot driver to continue the HTTP Boot process.
   @retval EFI_ABORTED             Tells the HTTP Boot driver to abort the current HTTP Boot process.
 **/
@@ -87,7 +87,7 @@ EFI_STATUS
  );
 
 ///
-/// EFI HTTP Boot Callback Protocol is invoked when the HTTP Boot driver is about to transmit or 
+/// EFI HTTP Boot Callback Protocol is invoked when the HTTP Boot driver is about to transmit or
 /// has received a packet. The EFI HTTP Boot Callback Protocol must be installed on the same handle
 /// as the Load File Protocol for the HTTP Boot.
 ///