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/Library/BaseS3StallLib/S3StallLib.c

@@ -1,9 +1,9 @@
 /** @file
   Stall Services that do stall and also enable the Stall operatation
   to be replayed during an S3 resume. This library class maps directly on top
-  of the Timer class. 
+  of the Timer class.
 
-  Copyright (c) 2007, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
 
   This program and the accompanying materials
   are licensed and made available under the terms and conditions
@@ -42,10 +42,10 @@ S3Stall (
   )
 {
   RETURN_STATUS    Status;
-  
+
   Status = S3BootScriptSaveStall (MicroSecondDelay (MicroSeconds));
   ASSERT (Status == RETURN_SUCCESS);
-  
+
   return MicroSeconds;
 }