reset: sti: kzalloc + kcalloc to kzalloc

Simplify allocation.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

Author: neheb

drivers/reset/sti/reset-syscfg.c

@@ -41,7 +41,7 @@ struct syscfg_reset_channel {
 struct syscfg_reset_controller {
 	struct reset_controller_dev rst;
 	bool active_low;
-	struct syscfg_reset_channel *channels;
+	struct syscfg_reset_channel channels[];
 };
 
 #define to_syscfg_reset_controller(_rst) \
@@ -135,15 +135,10 @@ static int syscfg_reset_controller_register(struct device *dev,
 	struct syscfg_reset_controller *rc;
 	int i, err;
 
-	rc = devm_kzalloc(dev, sizeof(*rc), GFP_KERNEL);
+	rc = devm_kzalloc(dev, struct_size(rc, channels, data->nr_channels), GFP_KERNEL);
 	if (!rc)
 		return -ENOMEM;
 
-	rc->channels = devm_kcalloc(dev, data->nr_channels,
-				    sizeof(*rc->channels), GFP_KERNEL);
-	if (!rc->channels)
-		return -ENOMEM;
-
 	rc->rst.ops = &syscfg_reset_ops;
 	rc->rst.of_node = dev->of_node;
 	rc->rst.nr_resets = data->nr_channels;