ASoC: jz4740: 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: NHulk Robot <hulkci@huawei.com>
Signed-off-by: NYueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20190727150738.54764-20-yuehaibing@huawei.comSigned-off-by: NMark Brown <broonie@kernel.org>

sound/soc/codecs/jz4740.c

@@ -318,7 +318,6 @@ static int jz4740_codec_probe(struct platform_device *pdev)
 {
 	int ret;
 	struct jz4740_codec *jz4740_codec;
-	struct resource *mem;
 	void __iomem *base;
 
 	jz4740_codec = devm_kzalloc(&pdev->dev, sizeof(*jz4740_codec),
@@ -326,8 +325,7 @@ static int jz4740_codec_probe(struct platform_device *pdev)
 	if (!jz4740_codec)
 		return -ENOMEM;
 
-	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	base = devm_ioremap_resource(&pdev->dev, mem);
+	base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(base))
 		return PTR_ERR(base);