pinctrl: sh-pfc: Convert to devm_gpiochip_add_data()

This allows to remove the .remove() callback, and all functions and data
it needed for its own bookkeeping.

Suggested-by: Laxman Dewangan <[e-mail]>
Signed-off-by: Geert Uytterhoeven <[e-mail]>
Acked-by: Linus Walleij <[e-mail]>

drivers/pinctrl/sh-pfc/core.c

···
 	return 0;
 }
 
-static int sh_pfc_remove(struct platform_device *pdev)
-{
-#ifdef CONFIG_PINCTRL_SH_PFC_GPIO
-	sh_pfc_unregister_gpiochip(platform_get_drvdata(pdev));
-#endif
-
-	return 0;
-}
-
 static const struct platform_device_id sh_pfc_id_table[] = {
 #ifdef CONFIG_PINCTRL_PFC_SH7203
 	{ "pfc-sh7203", (kernel_ulong_t)&sh7203_pinmux_info },
···
 
 static struct platform_driver sh_pfc_driver = {
 	.probe		= sh_pfc_probe,
-	.remove		= sh_pfc_remove,
 	.id_table	= sh_pfc_id_table,
 	.driver		= {
 		.name	= DRV_NAME,

drivers/pinctrl/sh-pfc/core.h

···
 };
 
 int sh_pfc_register_gpiochip(struct sh_pfc *pfc);
-int sh_pfc_unregister_gpiochip(struct sh_pfc *pfc);
 
 int sh_pfc_register_pinctrl(struct sh_pfc *pfc);
 

drivers/pinctrl/sh-pfc/gpio.c

···
 	if (ret < 0)
 		return ERR_PTR(ret);
 
-	ret = gpiochip_add_data(&chip->gpio_chip, chip);
+	ret = devm_gpiochip_add_data(pfc->dev, &chip->gpio_chip, chip);
 	if (unlikely(ret < 0))
 		return ERR_PTR(ret);
 
···
 	chip = sh_pfc_add_gpiochip(pfc, gpio_function_setup, NULL);
 	if (IS_ERR(chip))
 		return PTR_ERR(chip);
-
-	pfc->func = chip;
 #endif /* CONFIG_SUPERH */
 
-	return 0;
-}
-
-int sh_pfc_unregister_gpiochip(struct sh_pfc *pfc)
-{
-	gpiochip_remove(&pfc->gpio->gpio_chip);
-#ifdef CONFIG_SUPERH
-	gpiochip_remove(&pfc->func->gpio_chip);
-#endif
 	return 0;
 }

drivers/pinctrl/sh-pfc/sh_pfc.h

···
 	unsigned int nr_gpio_pins;
 
 	struct sh_pfc_chip *gpio;
-#ifdef CONFIG_SUPERH
-	struct sh_pfc_chip *func;
-#endif
 };
 
 struct sh_pfc_soc_operations {