netpoll: netpoll_poll_dev() should access dev->flags

commit 5a698af5 (bond: service netpoll arp queue on master device)
tested IFF_SLAVE flag against dev->priv_flags instead of dev->flags
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: WANG Cong <amwang@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/netpoll.c

@@ -194,7 +194,7 @@ static void netpoll_poll_dev(struct net_device *dev)
 
 	poll_napi(dev);
 
-	if (dev->priv_flags & IFF_SLAVE) {
+	if (dev->flags & IFF_SLAVE) {
 		if (dev->npinfo) {
 			struct net_device *bond_dev = dev->master;
 			struct sk_buff *skb;