macvlan: broadcast addr should be part of mc_filter

commit cd431e738509e (macvlan: add multicast filter) forgot
the broadcast case.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Maciej Żenczykowski <maze@google.com>
SIgned-off-by: Maciej Żenczykowski <maze@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/macvlan.c

@@ -426,6 +426,9 @@ static void macvlan_set_mac_lists(struct net_device *dev)
 		netdev_for_each_mc_addr(ha, dev) {
 			__set_bit(mc_hash(ha->addr), filter);
 		}
+
+		__set_bit(mc_hash(dev->broadcast), filter);
+
 		bitmap_copy(vlan->mc_filter, filter, MACVLAN_MC_FILTER_SZ);
 	}
 	dev_uc_sync(vlan->lowerdev, dev);