ASoC: au1x: don't check resource with devm_ioremap_resource

devm_ioremap_resource does sanity checks on the given resource. No need to
duplicate this in the driver.
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Mark Brown <broonie@linaro.org>

sound/soc/au1x/psc-ac97.c

@@ -379,9 +379,6 @@ static int au1xpsc_ac97_drvprobe(struct platform_device *pdev)
 	mutex_init(&wd->lock);
 
 	iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!iores)
-		return -ENODEV;
-
 	wd->mmio = devm_ioremap_resource(&pdev->dev, iores);
 	if (IS_ERR(wd->mmio))
 		return PTR_ERR(wd->mmio);