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/wireless/ray_cs.c b/drivers/net/wireless/ray_cs.c
index 88e1e4e..85905ca 100644
--- a/drivers/net/wireless/ray_cs.c
+++ b/drivers/net/wireless/ray_cs.c
@@ -1950,7 +1950,7 @@
 	if (dev->flags & IFF_ALLMULTI)
 		ray_update_multi_list(dev, 1);
 	else {
-		if (local->num_multi != dev->mc_count)
+		if (local->num_multi != netdev_mc_count(dev))
 			ray_update_multi_list(dev, 0);
 	}
 } /* end set_multicast_list */