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/Bus/Isa/Ps2KeyboardDxe/Ps2KbdTextIn.c

@@ -718,7 +718,7 @@ KeyNotifyProcessHandler (
   while (TRUE) {
     //
     // Enter critical section
-    //  
+    //
     OldTpl = gBS->RaiseTPL (TPL_NOTIFY);
     Status = PopEfikeyBufHead (&ConsoleIn->EfiKeyQueueForNotify, &KeyData);
     //