watchdog: wm8350: Simplify using devm_watchdog_register_device()

This allows to drop the .remove() function as it only exists to
unregister the watchdog device which is now done in a callback
registered by devm_watchdog_register_device().

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230307070404.2256308-4-u.kleine-koenig@pengutronix.de
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

Author: Uwe Kleine-König

drivers/watchdog/wm8350_wdt.c

@@ -153,18 +153,11 @@ static int wm8350_wdt_probe(struct platform_device *pdev)
 	/* Default to 4s timeout */
 	wm8350_wdt_set_timeout(&wm8350_wdt, 4);
 
-	return watchdog_register_device(&wm8350_wdt);
-}
-
-static int wm8350_wdt_remove(struct platform_device *pdev)
-{
-	watchdog_unregister_device(&wm8350_wdt);
-	return 0;
+	return devm_watchdog_register_device(&pdev->dev, &wm8350_wdt);
 }
 
 static struct platform_driver wm8350_wdt_driver = {
 	.probe = wm8350_wdt_probe,
-	.remove = wm8350_wdt_remove,
 	.driver = {
 		.name = "wm8350-wdt",
 	},