netvsc: add rtnl annotations in rndis

The rndis functions are used when changing device state.
Therefore the references from network device to internal state
are protected by RTNL mutex.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/hyperv/netvsc_drv.c

@@ -1548,6 +1548,7 @@ static int netvsc_probe(struct hv_device *dev,
 
 	netif_set_real_num_tx_queues(net, nvdev->num_chn);
 	netif_set_real_num_rx_queues(net, nvdev->num_chn);
+	rtnl_unlock();
 
 	netdev_lockdep_set_classes(net);