hv_netvsc: use netif_is_bond_master() instead of open code

Use netif_is_bond_master() function instead of open code, which is
((event_dev->priv_flags & IFF_BONDING) && (event_dev->flags & IFF_MASTER)).
This patch doesn't change logic.
Signed-off-by: Juhee Kang <claudiajkang@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/hyperv/netvsc_drv.c

@@ -2742,8 +2742,7 @@ static int netvsc_netdev_event(struct notifier_block *this,
 		return NOTIFY_DONE;
 
 	/* Avoid Bonding master dev with same MAC registering as VF */
-	if ((event_dev->priv_flags & IFF_BONDING) &&
-	    (event_dev->flags & IFF_MASTER))
+	if (netif_is_bond_master(event_dev))
 		return NOTIFY_DONE;
 
 	switch (event) {