PCI: xgene: Fix platform_get_irq() error handling

When platform_get_irq() fails we should propagate the real error value
instead of always returning -EINVAL.
Signed-off-by: NFabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
Cc: Duc Dang <dhdang@apm.com>

drivers/pci/host/pci-xgene-msi.c

@@ -489,7 +489,7 @@ static int xgene_msi_probe(struct platform_device *pdev)
 		if (virt_msir < 0) {
 			dev_err(&pdev->dev, "Cannot translate IRQ index %d\n",
 				irq_index);
-			rc = -EINVAL;
+			rc = virt_msir;
 			goto error;
 		}
 		xgene_msi->msi_groups[irq_index].gic_irq = virt_msir;