w1: omap-hdq: fix error return code in omap_hdq_probe()

platform_get_irq() returns an error code, but the omap_hdq
driver ignores it and always returns -ENXIO. This is not correct,
and prevents -EPROBE_DEFER from being propagated properly.
Notice that platform_get_irq() no longer returns 0 on error.

Print error message and propagate the return value of
platform_get_irq on failure.
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/w1/masters/omap_hdq.c

@@ -704,7 +704,8 @@ static int omap_hdq_probe(struct platform_device *pdev)
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq	< 0) {
-		ret = -ENXIO;
+		dev_dbg(&pdev->dev, "Failed to get IRQ: %d\n", irq);
+		ret = irq;
 		goto err_irq;
 	}