platform/x86: dell: dell-smo8800: Convert to platform remove callback returning void

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Pali Rohár <pali@kernel.org>
Link: https://lore.kernel.org/r/20230302144732.1903781-11-u.kleine-koenig@pengutronix.deReviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

drivers/platform/x86/dell/dell-smo8800.c

@@ -154,14 +154,13 @@ static int smo8800_probe(struct platform_device *device)
 	return err;
 }
 
-static int smo8800_remove(struct platform_device *device)
+static void smo8800_remove(struct platform_device *device)
 {
 	struct smo8800_device *smo8800 = platform_get_drvdata(device);
 
 	free_irq(smo8800->irq, smo8800);
 	misc_deregister(&smo8800->miscdev);
 	dev_dbg(&device->dev, "device /dev/freefall unregistered\n");
-	return 0;
 }
 
 /* NOTE: Keep this list in sync with drivers/i2c/busses/i2c-i801.c */
@@ -180,7 +179,7 @@ MODULE_DEVICE_TABLE(acpi, smo8800_ids);
 
 static struct platform_driver smo8800_driver = {
 	.probe = smo8800_probe,
-	.remove = smo8800_remove,
+	.remove_new = smo8800_remove,
 	.driver = {
 		.name = DRIVER_NAME,
 		.acpi_match_table = smo8800_ids,