Change DUET DxeIpl to use SerialPort instead of manipulating serial port directly.

Signed-off-by: niruiyu
Reviewed-by: jyao1

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11876 6f19259b-4bc3-4df7-8a09-765794883524

DuetPkg/DxeIpl/Debug.h

@@ -1,6 +1,6 @@
 /** @file
 
-Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2006 - 2011, 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        
@@ -26,19 +26,10 @@ PrintHeader (
   CHAR8 Char
   );
 
-VOID 
-PrintValue (
-  UINT32 Value
-  );
-
 VOID
-PrintValue64 (
-  UINT64 Value
-  );
-
-VOID 
 PrintString (
-  CHAR8 *String
+  IN CONST CHAR8  *FormatString,
+  ...
   );
 
 VOID