platform/chrome: cros_usbpd_logger: null check create_singlethread_workqueue

In cros_usbpd_logger_probe the return value of
create_singlethread_workqueue may be null, it should be checked.
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>

drivers/platform/chrome/cros_usbpd_logger.c

@@ -210,6 +210,9 @@ static int cros_usbpd_logger_probe(struct platform_device *pd)
 	/* Retrieve PD event logs periodically */
 	INIT_DELAYED_WORK(&logger->log_work, cros_usbpd_log_check);
 	logger->log_workqueue =	create_singlethread_workqueue("cros_usbpd_log");
+	if (!logger->log_workqueue)
+		return -ENOMEM;
+
 	queue_delayed_work(logger->log_workqueue, &logger->log_work,
 			   CROS_USBPD_LOG_UPDATE_DELAY);