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/acenic.c b/drivers/net/acenic.c
index ec624ab..4ae750e 100644
--- a/drivers/net/acenic.c
+++ b/drivers/net/acenic.c
@@ -2845,7 +2845,7 @@
 	 * set the entire multicast list at a time and keeping track of
 	 * it here is going to be messy.
 	 */
-	if ((dev->mc_count) && !(ap->mcast_all)) {
+	if (!netdev_mc_empty(dev) && !ap->mcast_all) {
 		cmd.evt = C_SET_MULTICAST_MODE;
 		cmd.code = C_C_MCAST_ENABLE;
 		cmd.idx = 0;