extcon: max14577: Fix probe failure on successful work queue

In probe the driver queued delayed work for cable detection and
returned the result of queue_delayed_work() call. However the return
value of queue_delayed_work() does not indicate an error and in normal
condition it returns true which means successful work queue.
This effectively resulted in probe failure:
[    2.088204] max14577-muic: probe of max77836-muic failed with error 1
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: <stable@vger.kernel.org>
Fixes: 962e56bf ("extcon: max14577: Add extcon-max14577 driver...")
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

drivers/extcon/extcon-max14577.c

@@ -782,13 +782,8 @@ static int max14577_muic_probe(struct platform_device *pdev)
 	 * driver should notify cable state to upper layer.
 	 */
 	INIT_DELAYED_WORK(&info->wq_detcable, max14577_muic_detect_cable_wq);
-	ret = queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
+	queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
 			delay_jiffies);
-	if (ret < 0) {
-		dev_err(&pdev->dev,
-			"failed to schedule delayed work for cable detect\n");
-		goto err_extcon;
-	}
 
 	return ret;