score: Add and use _Objects_Put()

Add and use _Objects_Put_without_thread_dispatch().  These two functions
pair with the _Objects_Get() function.  This helps to introduce object
specific SMP locks to avoid lock contention.

cpukit/sapi/src/extensiondelete.c

@@ -37,7 +37,7 @@ rtems_status_code rtems_extension_delete(
       _User_extensions_Remove_set( &the_extension->Extension );
       _Objects_Close( &_Extension_Information, &the_extension->Object );
       _Extension_Free( the_extension );
-      _Thread_Enable_dispatch();
+      _Objects_Put( &the_extension->Object );
       return RTEMS_SUCCESSFUL;
 
 #if defined(RTEMS_MULTIPROCESSING)