gpio: dln2: Use devm_gpiochip_add_data() for gpio registration

	platform_set_drvdata(pdev, dln2);

	ret = gpiochip_add_data(&dln2->gpio, dln2);

	ret = devm_gpiochip_add_data(dev, &dln2->gpio, dln2);

	if (ret < 0) {

		dev_err(dev, "failed to add gpio chip: %d\n", ret);

		goto out;

		return ret;

	}

	ret = gpiochip_irqchip_add(&dln2->gpio, &dln2_gpio_irqchip, 0,

				   handle_simple_irq, IRQ_TYPE_NONE);

	if (ret < 0) {

		dev_err(dev, "failed to add irq chip: %d\n", ret);

		goto out_gpiochip_remove;

		return ret;

	}

	ret = dln2_register_event_cb(pdev, DLN2_GPIO_CONDITION_MET_EV,

				     dln2_gpio_event);

	if (ret) {

		dev_err(dev, "failed to register event cb: %d\n", ret);

		goto out_gpiochip_remove;

		return ret;

	}

	return 0;

out_gpiochip_remove:

	gpiochip_remove(&dln2->gpio);

out:

	return ret;

}

static int dln2_gpio_remove(struct platform_device *pdev)

{

	struct dln2_gpio *dln2 = platform_get_drvdata(pdev);

	dln2_unregister_event_cb(pdev, DLN2_GPIO_CONDITION_MET_EV);

	gpiochip_remove(&dln2->gpio);

	return 0;

}