ASoC: kirkwood: fix IRQ error handling

Propagate the error code from request_irq(), rather than returning
-EBUSY.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/E1iNIqh-0000tW-EZ@rmk-PC.armlinux.org.ukSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/kirkwood/kirkwood-dma.c

@@ -133,7 +133,7 @@ static int kirkwood_dma_open(struct snd_soc_component *component,
 		err = request_irq(priv->irq, kirkwood_dma_irq, IRQF_SHARED,
 				  "kirkwood-i2s", priv);
 		if (err)
-			return -EBUSY;
+			return err;
 
 		/*
 		 * Enable Error interrupts. We're only ack'ing them but