gpio: zevio: Use of_mm_gpiochip_remove

Since d621e8bae5ac9c67 (Create of_mm_gpiochip_remove), there is a
counterpart for of_mm_gpiochip_add.

This patch implements the remove function of the driver making use of
it.

Cc: Alexandre Courbot <[e-mail]>
Cc: Fabian Vogt <[e-mail]>
Signed-off-by: Ricardo Ribalda Delgado <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>

drivers/gpio/gpio-zevio.c

···
 	if (!controller)
 		return -ENOMEM;
 
+	platform_set_drvdata(pdev, controller);
+
 	/* Copy our reference */
 	controller->chip.gc = zevio_gpio_chip;
 	controller->chip.gc.dev = &pdev->dev;
···
 	return 0;
 }
 
+static int zevio_gpio_remove(struct platform_device *pdev)
+{
+	struct zevio_gpio *controller = platform_get_drvdata(pdev);
+
+	of_mm_gpiochip_remove(&controller->chip);
+
+	return 0;
+}
+
 static const struct of_device_id zevio_gpio_of_match[] = {
 	{ .compatible = "lsi,zevio-gpio", },
 	{ },
···
 		.of_match_table = zevio_gpio_of_match,
 	},
 	.probe		= zevio_gpio_probe,
+	.remove		= zevio_gpio_remove,
 };
 module_platform_driver(zevio_gpio_driver);