net: use netdev_mc_count and netdev_mc_empty when appropriate

This patch replaces dev->mc_count in all drivers (hopefully I didn't miss
anything). Used spatch and did small tweaks and conding style changes when
it was suitable.

Jirka

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/de620.c b/drivers/net/de620.c
index 45794f6..a0a6830 100644
--- a/drivers/net/de620.c
+++ b/drivers/net/de620.c
@@ -464,7 +464,7 @@
 
 static void de620_set_multicast_list(struct net_device *dev)
 {
-	if (dev->mc_count || dev->flags&(IFF_ALLMULTI|IFF_PROMISC))
+	if (!netdev_mc_empty(dev) || dev->flags&(IFF_ALLMULTI|IFF_PROMISC))
 	{ /* Enable promiscuous mode */
 		de620_set_register(dev, W_TCR, (TCR_DEF & ~RXPBM) | RXALL);
 	}