ASoC: mxs-saif: 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/20190727150738.54764-12-yuehaibing@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/mxs/mxs-saif.c

@@ -732,7 +732,6 @@ static int mxs_saif_mclk_init(struct platform_device *pdev)
 static int mxs_saif_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
-	struct resource *iores;
 	struct mxs_saif *saif;
 	int irq, ret = 0;
 	struct device_node *master;
@@ -786,9 +785,7 @@ static int mxs_saif_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-
-	saif->base = devm_ioremap_resource(&pdev->dev, iores);
+	saif->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(saif->base))
 		return PTR_ERR(saif->base);