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/libertas/wext.c b/drivers/net/wireless/libertas/wext.c
index 4dec5e5..4ef5b9e 100644
--- a/drivers/net/wireless/libertas/wext.c
+++ b/drivers/net/wireless/libertas/wext.c
@@ -52,11 +52,9 @@
 {
 	struct chan_freq_power *cfp = NULL;
 	struct region_channel *rc;
-	int count = sizeof(adapter->region_channel) /
-	    sizeof(adapter->region_channel[0]);
 	int i, j;
 
-	for (j = 0; !cfp && (j < count); j++) {
+	for (j = 0; !cfp && (j < ARRAY_SIZE(adapter->region_channel)); j++) {
 		rc = &adapter->region_channel[j];
 
 		if (adapter->enable11d)
@@ -93,11 +91,9 @@
 {
 	struct chan_freq_power *cfp = NULL;
 	struct region_channel *rc;
-	int count = sizeof(adapter->region_channel) /
-	    sizeof(adapter->region_channel[0]);
 	int i, j;
 
-	for (j = 0; !cfp && (j < count); j++) {
+	for (j = 0; !cfp && (j < ARRAY_SIZE(adapter->region_channel)); j++) {
 		rc = &adapter->region_channel[j];
 
 		if (adapter->enable11d)
@@ -624,8 +620,7 @@
 	}
 	if (!flag) {
 		for (j = 0; (range->num_frequency < IW_MAX_FREQUENCIES)
-		     && (j < sizeof(adapter->region_channel)
-			 / sizeof(adapter->region_channel[0])); j++) {
+		     && (j < ARRAY_SIZE(adapter->region_channel)); j++) {
 			cfp = adapter->region_channel[j].CFP;
 			for (i = 0; (range->num_frequency < IW_MAX_FREQUENCIES)
 			     && adapter->region_channel[j].valid