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/tehuti.c b/drivers/net/tehuti.c
index ccb8d44..17585e5 100644
--- a/drivers/net/tehuti.c
+++ b/drivers/net/tehuti.c
@@ -621,7 +621,7 @@
 static void __init bdx_firmware_endianess(void)
 {
 	int i;
-	for (i = 0; i < sizeof(s_firmLoad) / sizeof(u32); i++)
+	for (i = 0; i < ARRAY_SIZE(s_firmLoad); i++)
 		s_firmLoad[i] = CPU_CHIP_SWAP32(s_firmLoad[i]);
 }