pwm: visconti: Simplify using devm_pwmchip_add()

This allows to drop the platform_driver's remove function. This is the
only user of driver data so this can go away, too.
Signed-off-by: zhaoxiao <long870912@gmail.com>
Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

drivers/pwm/pwm-visconti.c

@@ -144,28 +144,17 @@ static int visconti_pwm_probe(struct platform_device *pdev)
 	if (IS_ERR(priv->base))
 		return PTR_ERR(priv->base);
 
-	platform_set_drvdata(pdev, priv);
-
 	priv->chip.dev = dev;
 	priv->chip.ops = &visconti_pwm_ops;
 	priv->chip.npwm = 4;
 
-	ret = pwmchip_add(&priv->chip);
+	ret = devm_pwmchip_add(&pdev->dev, &priv->chip);
 	if (ret < 0)
 		return dev_err_probe(&pdev->dev, ret, "Cannot register visconti PWM\n");
 
 	return 0;
 }
 
-static int visconti_pwm_remove(struct platform_device *pdev)
-{
-	struct visconti_pwm_chip *priv = platform_get_drvdata(pdev);
-
-	pwmchip_remove(&priv->chip);
-
-	return 0;
-}
-
 static const struct of_device_id visconti_pwm_of_match[] = {
 	{ .compatible = "toshiba,visconti-pwm", },
 	{ }
@@ -178,7 +167,6 @@ static struct platform_driver visconti_pwm_driver = {
 		.of_match_table = visconti_pwm_of_match,
 	},
 	.probe = visconti_pwm_probe,
-	.remove = visconti_pwm_remove,
 };
 module_platform_driver(visconti_pwm_driver);