spi: s3c24xx: 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/20190904135918.25352-26-yuehaibing@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-s3c24xx.c

@@ -487,7 +487,6 @@ static int s3c24xx_spi_probe(struct platform_device *pdev)
 	struct s3c2410_spi_info *pdata;
 	struct s3c24xx_spi *hw;
 	struct spi_master *master;
-	struct resource *res;
 	int err = 0;
 
 	master = spi_alloc_master(&pdev->dev, sizeof(struct s3c24xx_spi));
@@ -536,8 +535,7 @@ static int s3c24xx_spi_probe(struct platform_device *pdev)
 	dev_dbg(hw->dev, "bitbang at %p\n", &hw->bitbang);
 
 	/* find and map our resources */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	hw->regs = devm_ioremap_resource(&pdev->dev, res);
+	hw->regs = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(hw->regs)) {
 		err = PTR_ERR(hw->regs);
 		goto err_no_pdata;