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/airo.c b/drivers/net/wireless/airo.c
index ef6b78d..c22a34c 100644
--- a/drivers/net/wireless/airo.c
+++ b/drivers/net/wireless/airo.c
@@ -2310,7 +2310,7 @@
 			airo_set_promisc(ai);
 	}
 
-	if ((dev->flags&IFF_ALLMULTI)||dev->mc_count>0) {
+	if ((dev->flags&IFF_ALLMULTI) || !netdev_mc_empty(dev)) {
 		/* Turn on multicast.  (Should be already setup...) */
 	}
 }