ASoC: rockchip: 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/20190727150738.54764-4-yuehaibing@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rk3328_codec.c

@@ -432,7 +432,6 @@ static int rk3328_platform_probe(struct platform_device *pdev)
 {
 	struct device_node *rk3328_np = pdev->dev.of_node;
 	struct rk3328_codec_priv *rk3328;
-	struct resource *res;
 	struct regmap *grf;
 	void __iomem *base;
 	int ret = 0;
@@ -482,8 +481,7 @@ static int rk3328_platform_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	base = devm_ioremap_resource(&pdev->dev, res);
+	base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(base))
 		return PTR_ERR(base);