mtd: nuc900_nand: remove redundant return value check of platform_get_resource()

Remove unneeded error handling on the result of a call
to platform_get_resource() when the value is passed to
devm_ioremap_resource().

Signed-off-by: Wei Yongjun <[e-mail]>
Reviewed-by: Jingoo Han <[e-mail]>
Signed-off-by: Brian Norris <[e-mail]>

drivers/mtd/nand/nuc900_nand.c

···
 	chip->ecc.mode		= NAND_ECC_SOFT;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res)
-		return -ENXIO;
-
 	nuc900_nand->reg = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(nuc900_nand->reg))
 		return PTR_ERR(nuc900_nand->reg);