ASoC: xtfpga-i2s: 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/20190727150738.54764-15-yuehaibing@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/xtensa/xtfpga-i2s.c

@@ -531,7 +531,6 @@ static int xtfpga_i2s_runtime_resume(struct device *dev)
 static int xtfpga_i2s_probe(struct platform_device *pdev)
 {
 	struct xtfpga_i2s *i2s;
-	struct resource *mem;
 	int err, irq;
 
 	i2s = devm_kzalloc(&pdev->dev, sizeof(*i2s), GFP_KERNEL);
@@ -543,8 +542,7 @@ static int xtfpga_i2s_probe(struct platform_device *pdev)
 	i2s->dev = &pdev->dev;
 	dev_dbg(&pdev->dev, "dev: %p, i2s: %p\n", &pdev->dev, i2s);
 
-	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	i2s->regs = devm_ioremap_resource(&pdev->dev, mem);
+	i2s->regs = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(i2s->regs)) {
 		err = PTR_ERR(i2s->regs);
 		goto err;