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/enc28j60.c b/drivers/net/enc28j60.c
index 66813c9..3ee32e5 100644
--- a/drivers/net/enc28j60.c
+++ b/drivers/net/enc28j60.c
@@ -1413,7 +1413,7 @@
 		if (netif_msg_link(priv))
 			dev_info(&dev->dev, "promiscuous mode\n");
 		priv->rxfilter = RXFILTER_PROMISC;
-	} else if ((dev->flags & IFF_ALLMULTI) || dev->mc_count) {
+	} else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev)) {
 		if (netif_msg_link(priv))
 			dev_info(&dev->dev, "%smulticast mode\n",
 				(dev->flags & IFF_ALLMULTI) ? "all-" : "");