Staging:vt6656: Replace some kzalloc calls with kcalloc in iwctl.c

This replacement is justified by the fact that kcalloc could prevent integer
overflow resulted from the multiplications used in kzalloc.

The semantic patch that showed this suggestion is kzalloc.cocci
Signed-off-by: NIulia Manda <iulia.manda21@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6656/iwctl.c

@@ -725,10 +725,10 @@ int iwctl_giwaplist(struct net_device *dev, struct iw_request_info *info,
 	if (!wrq->pointer)
 		return -EINVAL;
 
-	sock = kzalloc(sizeof(struct sockaddr) * IW_MAX_AP, GFP_KERNEL);
+	sock = kcalloc(IW_MAX_AP, sizeof(struct sockaddr), GFP_KERNEL);
 	if (sock == NULL)
 		return -ENOMEM;
-	qual = kzalloc(sizeof(struct iw_quality) * IW_MAX_AP, GFP_KERNEL);
+	qual = kcalloc(IW_MAX_AP, sizeof(struct iw_quality), GFP_KERNEL);
 	if (qual == NULL) {
 		kfree(sock);
 		return -ENOMEM;