EDAC/altera: Fix deferred probing

The driver overrides the error codes returned by platform_get_irq() to
-ENODEV 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: 71bcada ("edac: altera: Add Altera SDRAM EDAC support")
Signed-off-by: Sergey Shtylyov <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Acked-by: Dinh Nguyen <[email protected]>
Cc: <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: Sergey Shtylyov

drivers/edac/altera_edac.c

@@ -350,7 +350,7 @@ static int altr_sdram_probe(struct platform_device *pdev)
 	if (irq < 0) {
 		edac_printk(KERN_ERR, EDAC_MC,
 			    "No irq %d in DT\n", irq);
-		return -ENODEV;
+		return irq;
 	}
 
 	/* Arria10 has a 2nd IRQ */