[NET]: Prevent 'eth0: driver changed get_stats after register' from lying.

net/core/net-sysfs.c

@@ -408,6 +408,7 @@ int netdev_register_sysfs(struct net_device *net)
 
 	class_dev->class = &net_class;
 	class_dev->class_data = net;
+	net->last_stats = net->get_stats;
 
 	strlcpy(class_dev->class_id, net->name, BUS_ID_SIZE);
 	if ((ret = class_device_register(class_dev)))
@@ -419,7 +420,6 @@ int netdev_register_sysfs(struct net_device *net)
 	}
 
 
-	net->last_stats = net->get_stats;
 	if (net->get_stats &&
 	    (ret = sysfs_create_group(&class_dev->kobj, &netstat_group)))
 		goto out_unreg;