uio: uio_pdrv_genirq: Do not log an error when deferring probe routine.

When deferring the probe routine just return without displaying an
error.
Signed-off-by: Oscar Ravadilla <oscar.ravadilla@alliedtelesis.co.nz>
Link: https://lore.kernel.org/r/20200108001648.2949-1-oscar.ravadilla@alliedtelesis.co.nzSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/uio/uio_pdrv_genirq.c

@@ -156,6 +156,8 @@ static int uio_pdrv_genirq_probe(struct platform_device *pdev)
 		uioinfo->irq = ret;
 		if (ret == -ENXIO && pdev->dev.of_node)
 			uioinfo->irq = UIO_IRQ_NONE;
+		else if (ret == -EPROBE_DEFER)
+			return ret;
 		else if (ret < 0) {
 			dev_err(&pdev->dev, "failed to get IRQ\n");
 			return ret;