Add new interface GetVariable2 and GetEfiGlobalVariable2 to return more info. Also replace old interface with new one.

Signed-off-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13375 6f19259b-4bc3-4df7-8a09-765794883524

NetworkPkg/IScsiDxe/IScsiMisc.c

@@ -1,7 +1,7 @@
 /** @file
   Miscellaneous routines for iSCSI driver.
 
-Copyright (c) 2004 - 2011, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2004 - 2012, 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
@@ -1076,10 +1076,12 @@ IScsiGetConfigData (
       (UINTN) AttemptConfigOrder[Index]
       );
 
-    AttemptConfigData = (ISCSI_ATTEMPT_CONFIG_NVDATA *) GetVariable (
-                                                          mPrivate->PortString,
-                                                          &gEfiIScsiInitiatorNameProtocolGuid
-                                                          );
+    GetVariable2 (
+                 mPrivate->PortString,
+                 &gEfiIScsiInitiatorNameProtocolGuid,
+                 &AttemptConfigData,
+                 NULL
+                 );
 
     if (AttemptConfigData == NULL) {
       continue;