staging/otus: use ARRAY_SIZE

index f53e483..6940ddc 100644
@@ -72,7 +72,6 @@ s32_t BEACON_RSSI(zdev_t *dev)
 
 void zfHpAniAttach(zdev_t *dev)
 {
-#define N(a)     (sizeof(a) / sizeof(a[0]))
     u32_t i;
     struct zsHpPriv *HpPriv;
 

@@ -125,7 +124,6 @@ void zfHpAniAttach(zdev_t *dev)
     HpPriv->stats.ast_nodestats.ns_avgbrssi = ZM_RSSI_DUMMY_MARKER;
     HpPriv->stats.ast_nodestats.ns_avgrssi = ZM_RSSI_DUMMY_MARKER;
     HpPriv->stats.ast_nodestats.ns_avgtxrssi = ZM_RSSI_DUMMY_MARKER;
-#undef N
 }
 
 /*

@@ -133,7 +131,6 @@ void zfHpAniAttach(zdev_t *dev)
  */
 u8_t zfHpAniControl(zdev_t *dev, ZM_HAL_ANI_CMD cmd, int param)
 {
-#define N(a) (sizeof(a)/sizeof(a[0]))
     typedef s32_t TABLE[];
     struct zsHpPriv *HpPriv;
     struct zsAniState *aniState;

@@ -148,11 +145,12 @@ u8_t zfHpAniControl(zdev_t *dev, ZM_HAL_ANI_CMD cmd, int param)
     {
         u32_t level = param;
 
-        if (level >= N(HpPriv->totalSizeDesired)) {
-          zm_debug_msg1("level out of range, desired level : ", level);
-          zm_debug_msg1("max level : ", N(HpPriv->totalSizeDesired));
-          return FALSE;
-        }
+	if (level >= ARRAY_SIZE(HpPriv->totalSizeDesired)) {
+		zm_debug_msg1("level out of range, desired level : ", level);
+		zm_debug_msg1("max level : ",
+			ARRAY_SIZE(HpPriv->totalSizeDesired));
+		return FALSE;
+	}
 
         zfDelayWriteInternalReg(dev, AR_PHY_DESIRED_SZ,
                 (HpPriv->regPHYDesiredSZ & ~AR_PHY_DESIRED_SZ_TOT_DES)

@@ -260,12 +258,11 @@ u8_t zfHpAniControl(zdev_t *dev, ZM_HAL_ANI_CMD cmd, int param)
         const TABLE firstep = { 0, 4, 8 };
         u32_t level = param;
 
-        if (level >= N(firstep))
-        {
-            zm_debug_msg1("level out of range, desired level : ", level);
-            zm_debug_msg1("max level : ", N(firstep));
-            return FALSE;
-        }
+	if (level >= ARRAY_SIZE(firstep)) {
+		zm_debug_msg1("level out of range, desired level : ", level);
+		zm_debug_msg1("max level : ", ARRAY_SIZE(firstep));
+		return FALSE;
+	}
         zfDelayWriteInternalReg(dev, AR_PHY_FIND_SIG,
                 (HpPriv->regPHYFindSig & ~AR_PHY_FIND_SIG_FIRSTEP)
                 | ((firstep[level] << AR_PHY_FIND_SIG_FIRSTEP_S)

@@ -283,12 +280,11 @@ u8_t zfHpAniControl(zdev_t *dev, ZM_HAL_ANI_CMD cmd, int param)
         const TABLE cycpwrThr1 = { 2, 4, 6, 8, 10, 12, 14, 16 };
         u32_t level = param;
 
-        if (level >= N(cycpwrThr1))
-        {
-            zm_debug_msg1("level out of range, desired level : ", level);
-            zm_debug_msg1("max level : ", N(cycpwrThr1));
-            return FALSE;
-        }
+	if (level >= ARRAY_SIZE(cycpwrThr1)) {
+		zm_debug_msg1("level out of range, desired level : ", level);
+		zm_debug_msg1("max level : ", ARRAY_SIZE(cycpwrThr1));
+		return FALSE;
+	}
         zfDelayWriteInternalReg(dev, AR_PHY_TIMING5,
                 (HpPriv->regPHYTiming5 & ~AR_PHY_TIMING5_CYCPWR_THR1)
                 | ((cycpwrThr1[level] << AR_PHY_TIMING5_CYCPWR_THR1_S)

@@ -335,7 +331,6 @@ u8_t zfHpAniControl(zdev_t *dev, ZM_HAL_ANI_CMD cmd, int param)
         return FALSE;
     }
     return TRUE;
-#undef  N
 }
 
 void zfHpAniRestart(zdev_t* dev)