drivers/net/wireless/ath/ath9k: use ARRAY_SIZE macro in ani.c

Replace (sizeof(ofdm_level_table)/sizeof(ofdm_level_table[0]) with
ARRAY_SIZE(ofdm_level_table), and (sizeof(cck_level_table)/
sizeof(cck_level_table[0]) with ARRAY_SIZE(cck_level_table) in
drivers/net/wireless/ath/ath9k/ani.c

Signed-off-by: Nikitas Angelinas <nikitasangelinas@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/ani.c

@@ -14,6 +14,7 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
+#include <linux/kernel.h>
 #include "hw.h"
 #include "hw-ops.h"
 
@@ -48,7 +49,7 @@ static const struct ani_ofdm_level_entry ofdm_level_table[] = {
 	{  7,  8,  0  }  /* lvl 9 */
 };
 #define ATH9K_ANI_OFDM_NUM_LEVEL \
-	(sizeof(ofdm_level_table)/sizeof(ofdm_level_table[0]))
+	ARRAY_SIZE(ofdm_level_table)
 #define ATH9K_ANI_OFDM_MAX_LEVEL \
 	(ATH9K_ANI_OFDM_NUM_LEVEL-1)
 #define ATH9K_ANI_OFDM_DEF_LEVEL \
@@ -94,7 +95,7 @@ static const struct ani_cck_level_entry cck_level_table[] = {
 };
 
 #define ATH9K_ANI_CCK_NUM_LEVEL \
-	(sizeof(cck_level_table)/sizeof(cck_level_table[0]))
+	ARRAY_SIZE(cck_level_table)
 #define ATH9K_ANI_CCK_MAX_LEVEL \
 	(ATH9K_ANI_CCK_NUM_LEVEL-1)
 #define ATH9K_ANI_CCK_MAX_LEVEL_LOW_RSSI \