ASoC: meson: axg-fifo: use devm_platform_ioremap_resource() to simplify code

Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20190727150738.54764-31-yuehaibing@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/meson/axg-fifo.c

@@ -314,7 +314,6 @@ int axg_fifo_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	const struct axg_fifo_match_data *data;
 	struct axg_fifo *fifo;
-	struct resource *res;
 	void __iomem *regs;
 
 	data = of_device_get_match_data(dev);
@@ -328,8 +327,7 @@ int axg_fifo_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	platform_set_drvdata(pdev, fifo);
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	regs = devm_ioremap_resource(dev, res);
+	regs = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(regs))
 		return PTR_ERR(regs);