ARM: OMAP2+: omap_device: fix error return code in omap_device_copy_resources()

Fix to return error code -EINVAL from the irq_of_parse_and_map() error
handling case instead of 0, as done elsewhere in this function.

Fixes: d85a2d61 ("ARM: OMAP2+: Populate legacy resources for dma
and smartreflex")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/omap_device.c

@@ -433,8 +433,10 @@ omap_device_copy_resources(struct omap_hwmod *oh,
 		irq = irq_of_parse_and_map(child, 0);
 	if (!irq)
 		irq = irq_of_parse_and_map(np, 0);
-	if (!irq)
+	if (!irq) {
+		error = -EINVAL;
 		goto free;
+	}
 
 	/* Legacy DMA code needs interrupt name to be "0" */
 	res[1].start = irq;