hv_netvsc: fix filter flags

The recent change to not always enable all multicast and broadcast
was broken; meant to set filter, not change flags.

Fixes: 009f766 ("hv_netvsc: filter multicast/broadcast")
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/hyperv/rndis_filter.c

@@ -861,9 +861,9 @@ static void rndis_set_multicast(struct work_struct *w)
 		filter = NDIS_PACKET_TYPE_PROMISCUOUS;
 	} else {
 		if (flags & IFF_ALLMULTI)
-			flags |= NDIS_PACKET_TYPE_ALL_MULTICAST;
+			filter |= NDIS_PACKET_TYPE_ALL_MULTICAST;
 		if (flags & IFF_BROADCAST)
-			flags |= NDIS_PACKET_TYPE_BROADCAST;
+			filter |= NDIS_PACKET_TYPE_BROADCAST;
 	}
 
 	rndis_filter_set_packet_filter(rdev, filter);