mmc: mtk-sd: convert to devm_platform_ioremap_resource

Use devm_platform_ioremap_resource() to simplify code.
Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Link: https://lore.kernel.org/r/20191215175120.3290-12-tiny.windzz@gmail.comSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/mtk-sd.c

@@ -2194,8 +2194,7 @@ static int msdc_drv_probe(struct platform_device *pdev)
 	if (ret)
 		goto host_free;
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	host->base = devm_ioremap_resource(&pdev->dev, res);
+	host->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(host->base)) {
 		ret = PTR_ERR(host->base);
 		goto host_free;