drivers/net/: all drivers/net/ cleanup with ARRAY_SIZE

Signed-off-by: Denis Cheng <crquan@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/ixgb/ixgb_ethtool.c b/drivers/net/ixgb/ixgb_ethtool.c
index 0413cd9..21d35bc 100644
--- a/drivers/net/ixgb/ixgb_ethtool.c
+++ b/drivers/net/ixgb/ixgb_ethtool.c
@@ -94,8 +94,7 @@
 	{"tx_csum_offload_errors", IXGB_STAT(hw_csum_tx_error)}
 };
 
-#define IXGB_STATS_LEN	\
-	sizeof(ixgb_gstrings_stats) / sizeof(struct ixgb_stats)
+#define IXGB_STATS_LEN	ARRAY_SIZE(ixgb_gstrings_stats)
 
 static int
 ixgb_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)