scsi: ufshcd: use devm_platform_ioremap_resource() to simplify code

Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.

Link: https://lore.kernel.org/r/20190904130348.24772-1-yuehaibing@huawei.comReported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/ufs/ufshcd-pltfrm.c

@@ -391,12 +391,10 @@ int ufshcd_pltfrm_init(struct platform_device *pdev,
 {
 	struct ufs_hba *hba;
 	void __iomem *mmio_base;
-	struct resource *mem_res;
 	int irq, err;
 	struct device *dev = &pdev->dev;
 
-	mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	mmio_base = devm_ioremap_resource(dev, mem_res);
+	mmio_base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(mmio_base)) {
 		err = PTR_ERR(mmio_base);
 		goto out;