pinctrl: madera: Add missing call to pinctrl_unregister_mappings

pinctrl_register_mappings is called in the pdata case, however a call to
pinctrl_unregister_mappings is missing causing the mappings to be leaked
on driver unbind. Add the missing call to correct this issue.

Signed-off-by: Charles Keepax <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Linus Walleij <[e-mail]>

drivers/pinctrl/cirrus/pinctrl-madera-core.c

···
 		return ret;
 	}
 
+	platform_set_drvdata(pdev, priv);
+
 	dev_dbg(priv->dev, "pinctrl probed ok\n");
+
+	return 0;
+}
+
+static int madera_pin_remove(struct platform_device *pdev)
+{
+	struct madera_pin_private *priv = platform_get_drvdata(pdev);
+
+	if (priv->madera->pdata.gpio_configs)
+		pinctrl_unregister_mappings(priv->madera->pdata.gpio_configs);
 
 	return 0;
 }
 
 static struct platform_driver madera_pin_driver = {
 	.probe = madera_pin_probe,
+	.remove = madera_pin_remove,
 	.driver = {
 		.name = "madera-pinctrl",
 	},