EDAC/xgene: Fix deferred probing

The driver overrides error codes returned by platform_get_irq_optional()
to -EINVAL for some strange reason, so if it returns -EPROBE_DEFER, the
driver will fail the probe permanently instead of the deferred probing.
Switch to propagating the proper error codes to platform driver code
upwards.

  [ bp: Massage commit message. ]

Fixes: 0d44293 ("EDAC: Add APM X-Gene SoC EDAC driver")
Signed-off-by: Sergey Shtylyov <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Cc: <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: Sergey Shtylyov

drivers/edac/xgene_edac.c

@@ -1919,7 +1919,7 @@ static int xgene_edac_probe(struct platform_device *pdev)
 			irq = platform_get_irq_optional(pdev, i);
 			if (irq < 0) {
 				dev_err(&pdev->dev, "No IRQ resource\n");
-				rc = -EINVAL;
+				rc = irq;
 				goto out_err;
 			}
 			rc = devm_request_irq(&pdev->dev, irq,