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/smsc9420.c b/drivers/net/smsc9420.c
index 1495a5d..2bd3c98 100644
--- a/drivers/net/smsc9420.c
+++ b/drivers/net/smsc9420.c
@@ -1062,7 +1062,7 @@
 		mac_cr &= (~MAC_CR_PRMS_);
 		mac_cr |= MAC_CR_MCPAS_;
 		mac_cr &= (~MAC_CR_HPFILT_);
-	} else if (dev->mc_count > 0) {
+	} else if (!netdev_mc_empty(dev)) {
 		struct dev_mc_list *mc_list = dev->mc_list;
 		u32 hash_lo = 0, hash_hi = 0;