MdeModulePkg: 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>
Reviewed-by: Star Zeng <star.zeng@intel.com>

MdeModulePkg/Library/FileExplorerLib/FileExplorerVfr.vfr

@@ -2,7 +2,7 @@
 //
 //    File Explorer Formset
 //
-//  Copyright (c) 2004 - 2017, Intel Corporation. All rights reserved.<BR>
+//  Copyright (c) 2004 - 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
@@ -82,4 +82,4 @@ formset
         key    = KEY_VALUE_NO_CREATE_FOLDER_AND_EXIT;
   endform;
 
-endformset;
+endformset;