w1: use put_device() if device_register() fail

If device_register() returned an error! Always use put_device()
to give up the reference initialized in device_register().
Signed-off-by: NArvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/w1/w1.c

@@ -706,6 +706,7 @@ static int __w1_attach_slave_device(struct w1_slave *sl)
 		dev_err(&sl->dev,
 			"Device registration [%s] failed. err=%d\n",
 			dev_name(&sl->dev), err);
+		put_device(&sl->dev);
 		return err;
 	}
 	w1_family_notify(BUS_NOTIFY_ADD_DEVICE, sl);