drivers: dpaa2: Use devm_kcalloc() in setup_dpni()

A multiplication for the size determination of a memory allocation
indicated that an array data structure should be processed.
Thus use the corresponding function "devm_kcalloc".
Signed-off-by: NXu Wang <vulab@iscas.ac.cn>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c

@@ -2907,8 +2907,9 @@ static int setup_dpni(struct fsl_mc_device *ls_dev)
 	if (err && err != -EOPNOTSUPP)
 		goto close;
 
-	priv->cls_rules = devm_kzalloc(dev, sizeof(struct dpaa2_eth_cls_rule) *
-				       dpaa2_eth_fs_count(priv), GFP_KERNEL);
+	priv->cls_rules = devm_kcalloc(dev, dpaa2_eth_fs_count(priv),
+				       sizeof(struct dpaa2_eth_cls_rule),
+				       GFP_KERNEL);
 	if (!priv->cls_rules) {
 		err = -ENOMEM;
 		goto close;