ASoC: sirf-audio: 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/20190904083412.18700-1-yuehaibing@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/sirf-audio-codec.c

@@ -459,7 +459,6 @@ static int sirf_audio_codec_driver_probe(struct platform_device *pdev)
 	int ret;
 	struct sirf_audio_codec *sirf_audio_codec;
 	void __iomem *base;
-	struct resource *mem_res;
 
 	sirf_audio_codec = devm_kzalloc(&pdev->dev,
 		sizeof(struct sirf_audio_codec), GFP_KERNEL);
@@ -468,8 +467,7 @@ static int sirf_audio_codec_driver_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, sirf_audio_codec);
 
-	mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	base = devm_ioremap_resource(&pdev->dev, mem_res);
+	base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(base))
 		return PTR_ERR(base);