imx-hdmi: Propagate the real error code on platform_get_irq() failure

No need to return a 'fake' return value on platform_get_irq() failure.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/imx-drm/imx-hdmi.c

@@ -1625,7 +1625,7 @@ static int imx_hdmi_bind(struct device *dev, struct device *master, void *data)
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
-		return -EINVAL;
+		return irq;
 
 	ret = devm_request_threaded_irq(dev, irq, imx_hdmi_hardirq,
 					imx_hdmi_irq, IRQF_SHARED,