mmc: meson-mx-sdio: 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/20191215175120.3290-3-tiny.windzz@gmail.comSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/meson-mx-sdio.c

@@ -638,7 +638,6 @@ static int meson_mx_mmc_probe(struct platform_device *pdev)
 	struct platform_device *slot_pdev;
 	struct mmc_host *mmc;
 	struct meson_mx_mmc_host *host;
-	struct resource *res;
 	int ret, irq;
 	u32 conf;
 
@@ -663,8 +662,7 @@ static int meson_mx_mmc_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, host);
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	host->base = devm_ioremap_resource(host->controller_dev, res);
+	host->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(host->base)) {
 		ret = PTR_ERR(host->base);
 		goto error_free_mmc;