mtd: rawnand: atmel: Make use of the helper function devm_platform_ioremap_resource()

Use the devm_platform_ioremap_resource() helper instead of
calling platform_get_resource() and devm_ioremap_resource()
separately
Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
Reviewed-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210901074031.8883-1-caihuoqing@baidu.com

drivers/mtd/nand/raw/atmel/pmecc.c

@@ -834,7 +834,6 @@ static struct atmel_pmecc *atmel_pmecc_create(struct platform_device *pdev,
 {
 	struct device *dev = &pdev->dev;
 	struct atmel_pmecc *pmecc;
-	struct resource *res;
 
 	pmecc = devm_kzalloc(dev, sizeof(*pmecc), GFP_KERNEL);
 	if (!pmecc)
@@ -844,13 +843,11 @@ static struct atmel_pmecc *atmel_pmecc_create(struct platform_device *pdev,
 	pmecc->dev = dev;
 	mutex_init(&pmecc->lock);
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, pmecc_res_idx);
-	pmecc->regs.base = devm_ioremap_resource(dev, res);
+	pmecc->regs.base = devm_platform_ioremap_resource(pdev, pmecc_res_idx);
 	if (IS_ERR(pmecc->regs.base))
 		return ERR_CAST(pmecc->regs.base);
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, errloc_res_idx);
-	pmecc->regs.errloc = devm_ioremap_resource(dev, res);
+	pmecc->regs.errloc = devm_platform_ioremap_resource(pdev, errloc_res_idx);
 	if (IS_ERR(pmecc->regs.errloc))
 		return ERR_CAST(pmecc->regs.errloc);