ds2780_battery: Use devm_kzalloc()

Use devm_kzalloc() to make cleanup paths more simple.

Signed-off-by: Jingoo Han <[e-mail]>
Signed-off-by: Anton Vorontsov <[e-mail]>

drivers/power/ds2780_battery.c

···
 	int ret = 0;
 	struct ds2780_device_info *dev_info;
 
-	dev_info = kzalloc(sizeof(*dev_info), GFP_KERNEL);
+	dev_info = devm_kzalloc(&pdev->dev, sizeof(*dev_info), GFP_KERNEL);
 	if (!dev_info) {
 		ret = -ENOMEM;
 		goto fail;
···
 	ret = power_supply_register(&pdev->dev, &dev_info->bat);
 	if (ret) {
 		dev_err(dev_info->dev, "failed to register battery\n");
-		goto fail_free_info;
+		goto fail;
 	}
 
 	ret = sysfs_create_group(&dev_info->bat.dev->kobj, &ds2780_attr_group);
···
 	sysfs_remove_group(&dev_info->bat.dev->kobj, &ds2780_attr_group);
 fail_unregister:
 	power_supply_unregister(&dev_info->bat);
-fail_free_info:
-	kfree(dev_info);
 fail:
 	return ret;
 }
···
 
 	power_supply_unregister(&dev_info->bat);
 
-	kfree(dev_info);
 	return 0;
 }