iio: ep93xx: 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: NWei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: NJonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/adc/ep93xx_adc.c

@@ -167,10 +167,6 @@ static int ep93xx_adc_probe(struct platform_device *pdev)
 	priv = iio_priv(iiodev);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "Cannot obtain memory resource\n");
-		return -ENXIO;
-	}
 	priv->base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(priv->base)) {
 		dev_err(&pdev->dev, "Cannot map memory resource\n");