netdev: ARRAY_SIZE() cleanups

Convert array size calculations to use ARRAY_SIZE().

Signed-off-by: Alejandro Martinez Ruiz <alex@flawedcode.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/wireless/wavelan.c b/drivers/net/wireless/wavelan.c
index a1f8a16..b343ce2 100644
--- a/drivers/net/wireless/wavelan.c
+++ b/drivers/net/wireless/wavelan.c
@@ -3740,7 +3740,7 @@
 	 * non-NCR/AT&T/Lucent ISA card.  See wavelan.p.h for detail on
 	 * how to configure your card.
 	 */
-	for (i = 0; i < (sizeof(MAC_ADDRESSES) / sizeof(char) / 3); i++)
+	for (i = 0; i < ARRAY_SIZE(MAC_ADDRESSES); i++)
 		if ((mac[0] == MAC_ADDRESSES[i][0]) &&
 		    (mac[1] == MAC_ADDRESSES[i][1]) &&
 		    (mac[2] == MAC_ADDRESSES[i][2]))