Follow UEFI spec to convert unrecognized device path structure from/to hex dump text.

Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15119 6f19259b-4bc3-4df7-8a09-765794883524

MdePkg/Library/UefiDevicePathLib/UefiDevicePathLib.h

@@ -1,7 +1,7 @@
 /** @file
   Definition for Device Path library.
 
-Copyright (c) 2013, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2013 - 2014, 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
@@ -68,6 +68,11 @@ typedef struct {
   DEVICE_PATH_TO_TEXT  Function;
 } DEVICE_PATH_TO_TEXT_TABLE;
 
+typedef struct {
+  UINT8                Type;
+  CHAR16               *Text;
+} DEVICE_PATH_TO_TEXT_GENERIC_TABLE;
+
 typedef struct {
   CHAR16                    *DevicePathNodeText;
   DEVICE_PATH_FROM_TEXT     Function;