ARM: sa1111: fix error code propagation in sa1111_probe()

Ensure that we propagate the platform_get_irq() error code out of the
probe function.  This allows probe deferrals to work correctly should
platform_get_irq() not be able to resolve the interrupt in a DT
environment at probe time.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

arch/arm/common/sa1111.c

@@ -1017,7 +1017,7 @@ static int sa1111_probe(struct platform_device *pdev)
 		return -EINVAL;
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
-		return -ENXIO;
+		return irq;
 
 	return __sa1111_probe(&pdev->dev, mem, irq);
 }