watchdog: mena21_wdt: drop warning after registering device

The core will print out details now.

Signed-off-by: Wolfram Sang <[e-mail]>
Signed-off-by: Guenter Roeck <[e-mail]>
Signed-off-by: Wim Van Sebroeck <[e-mail]>

drivers/watchdog/mena21_wdt.c

···
 	dev_set_drvdata(dev, drv);
 
 	ret = devm_watchdog_register_device(dev, &a21_wdt);
-	if (ret) {
-		dev_err(dev, "Cannot register watchdog device\n");
+	if (ret)
 		return ret;
-	}
 
 	dev_info(dev, "MEN A21 watchdog timer driver enabled\n");