mfd: Fix ezx_pcap_probe error path

return -ENOMEM if create_singlethread_workqueue failed.

Signed-off-by: Axel Lin <[e-mail]>
Signed-off-by: Samuel Ortiz <[e-mail]>

drivers/mfd/ezx-pcap.c

···
 	pcap->irq_base = pdata->irq_base;
 	pcap->workqueue = create_singlethread_workqueue("pcapd");
 	if (!pcap->workqueue) {
+		ret = -ENOMEM;
 		dev_err(&spi->dev, "cant create pcap thread\n");
 		goto free_pcap;
 	}