ASoC: txx9: 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/txx9/txx9aclc-ac97.c

@@ -184,9 +184,6 @@ static int txx9aclc_ac97_dev_probe(struct platform_device *pdev)
 	if (irq < 0)
 		return irq;
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!r)
-		return -EBUSY;
-
 	drvdata->base = devm_ioremap_resource(&pdev->dev, r);
 	if (IS_ERR(drvdata->base))
 		return PTR_ERR(drvdata->base);