Clear up network stack to use R9 MdeLib:

1.Use driver model APIs in UefiLib
2.Register Unload Image in INF/MSA to be included in autogen code.


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3970 6f19259b-4bc3-4df7-8a09-765794883524

Nt32Pkg/SnpNt32Dxe/SnpNt32.c

@@ -1018,15 +1018,14 @@ Returns:
   // Install the Driver Protocols
   //
 
-  Status = NetLibInstallAllDriverProtocolsWithUnload (
+  Status = EfiLibInstallAllDriverProtocols (
             ImageHandle,
             SystemTable,
             &gSnpNt32DriverBinding,
             ImageHandle,
             &gSnpNt32DriverComponentName,
             NULL,
-            NULL,
-            SnpNt32Unload
+            NULL
             );
   if (EFI_ERROR (Status)) {
     return Status;