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/BaseLib/Arm/DisableInterrupts.asm

@@ -1,8 +1,8 @@
-;------------------------------------------------------------------------------ 
+;------------------------------------------------------------------------------
 ;
 ; DisableInterrupts() for ARM
 ;
-; Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
+; Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
 ; Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
 ; This program and the accompanying materials
 ; are licensed and made available under the terms and conditions of the BSD License
@@ -33,5 +33,5 @@ DisableInterrupts
     ORR     R0,R0,#0x80             ;Disable IRQ interrupts
     MSR     CPSR_c,R0
     BX      LR
-    
+
     END