gpio-button-hotplug: fix crash on remove

Don't call gpio_keys_remove recursively. Setting the platform
data to NULL triggered an oops on the second iteration, so there was
no infinate loop.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 39124

package/kernel/gpio-button-hotplug/src/gpio-button-hotplug.c

@@ -612,7 +612,7 @@ static int gpio_keys_remove(struct platform_device *pdev)
 	if (bdev->polled)
 		gpio_keys_polled_close(bdev);
 
-	return gpio_keys_remove(pdev);
+	return 0;
 }
 
 static struct platform_driver gpio_keys_driver = {