Fix memory leak issues in BiosSnp module.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Elvin Li <elvin.li@intel.com>
Reviewed-by: Jeff Fan <jeff.fan@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15671 6f19259b-4bc3-4df7-8a09-765794883524

IntelFrameworkModulePkg/Csm/BiosThunk/Snp16Dxe/BiosSnp16.c

@@ -1,6 +1,6 @@
 /** @file
 
-Copyright (c) 1999 - 2012, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 1999 - 2014, Intel Corporation. All rights reserved.<BR>
 
 This program and the accompanying materials
 are licensed and made available under the terms and conditions
@@ -1260,6 +1260,11 @@ Undi16SimpleNetworkLoadUndi (
     if (!EFI_ERROR (Status)) {
       return EFI_SUCCESS;
     }
+    
+    //
+    // Free resources allocated in LaunchBaseCode
+    //
+    Undi16SimpleNetworkUnloadUndi (SimpleNetworkDevice);
   }
 
   return EFI_NOT_FOUND;