Staging: greybus: light: Prefer kcalloc over kzalloc

Fixed following checkpatch.pl warning:
 * WARNING: Prefer kcalloc over kzalloc with multiply

Instead of specifying no.of bytes * size as argument
in kzalloc, prefer kcalloc.
Signed-off-by: Karthik Tummala <karthik@techveda.org>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>

Changes for v2:
- Changed subject line & fixed typo as suggested by
  Rui Miguel Silva
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/greybus/light.c

@@ -1030,7 +1030,7 @@ static int gb_lights_light_config(struct gb_lights *glights, u8 id)
 	light->channels_count = conf.channel_count;
 	light->name = kstrndup(conf.name, NAMES_MAX, GFP_KERNEL);
 
-	light->channels = kzalloc(light->channels_count *
+	light->channels = kcalloc(light->channels_count,
 				  sizeof(struct gb_channel), GFP_KERNEL);
 	if (!light->channels)
 		return -ENOMEM;
@@ -1167,7 +1167,7 @@ static int gb_lights_create_all(struct gb_lights *glights)
 	if (ret < 0)
 		goto out;
 
-	glights->lights = kzalloc(glights->lights_count *
+	glights->lights = kcalloc(glights->lights_count,
 				  sizeof(struct gb_light), GFP_KERNEL);
 	if (!glights->lights) {
 		ret = -ENOMEM;