mfd: cros_ec: Use devm_kzalloc for private data

Use dev_kzmalloc, remove .release entry point.
Signed-off-by: NGwendal Grignou <gwendal@chromium.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

drivers/mfd/cros_ec_dev.c

@@ -262,12 +262,7 @@ static const struct file_operations fops = {
 #endif
 };
 
-static void __remove(struct device *dev)
-{
-	struct cros_ec_dev *ec = container_of(dev, struct cros_ec_dev,
-					      class_dev);
-	kfree(ec);
-}
+static void __remove(struct device *dev) { }
 
 static void cros_ec_sensors_register(struct cros_ec_dev *ec)
 {
@@ -392,7 +387,7 @@ static int ec_device_probe(struct platform_device *pdev)
 	int retval = -ENOMEM;
 	struct device *dev = &pdev->dev;
 	struct cros_ec_platform *ec_platform = dev_get_platdata(dev);
-	struct cros_ec_dev *ec = kzalloc(sizeof(*ec), GFP_KERNEL);
+	struct cros_ec_dev *ec = devm_kzalloc(dev, sizeof(*ec), GFP_KERNEL);
 
 	if (!ec)
 		return retval;
@@ -414,7 +409,6 @@ static int ec_device_probe(struct platform_device *pdev)
 	ec->class_dev.devt = MKDEV(ec_major, pdev->id);
 	ec->class_dev.class = &cros_class;
 	ec->class_dev.parent = dev;
-	ec->class_dev.release = __remove;
 
 	retval = dev_set_name(&ec->class_dev, "%s", ec_platform->ec_name);
 	if (retval) {