mtd: rawnand: mtk: use of_device_get_match_data()

The usage of of_device_get_match_data() reduce the code size a bit.

Also, the only way to call .probe() is to match an entry in
.of_match_table[], so of_device_id cannot be NULL.
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Reviewed-by: Xiaolei Li <xiaolei.li@mediatek.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>

drivers/mtd/nand/raw/mtk_ecc.c

@@ -500,7 +500,6 @@ static int mtk_ecc_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct mtk_ecc *ecc;
 	struct resource *res;
-	const struct of_device_id *of_ecc_id = NULL;
 	u32 max_eccdata_size;
 	int irq, ret;
 
@@ -508,11 +507,7 @@ static int mtk_ecc_probe(struct platform_device *pdev)
 	if (!ecc)
 		return -ENOMEM;
 
-	of_ecc_id = of_match_device(mtk_ecc_dt_match, &pdev->dev);
-	if (!of_ecc_id)
-		return -ENODEV;
-
-	ecc->caps = of_ecc_id->data;
+	ecc->caps = of_device_get_match_data(dev);
 
 	max_eccdata_size = ecc->caps->num_ecc_strength - 1;
 	max_eccdata_size = ecc->caps->ecc_strength[max_eccdata_size];

drivers/mtd/nand/raw/mtk_nand.c

@@ -1434,7 +1434,6 @@ static int mtk_nfc_probe(struct platform_device *pdev)
 	struct device_node *np = dev->of_node;
 	struct mtk_nfc *nfc;
 	struct resource *res;
-	const struct of_device_id *of_nfc_id = NULL;
 	int ret, irq;
 
 	nfc = devm_kzalloc(dev, sizeof(*nfc), GFP_KERNEL);
@@ -1452,6 +1451,7 @@ static int mtk_nfc_probe(struct platform_device *pdev)
 	else if (!nfc->ecc)
 		return -ENODEV;
 
+	nfc->caps = of_device_get_match_data(dev);
 	nfc->dev = dev;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -1498,14 +1498,6 @@ static int mtk_nfc_probe(struct platform_device *pdev)
 		goto clk_disable;
 	}
 
-	of_nfc_id = of_match_device(mtk_nfc_id_table, &pdev->dev);
-	if (!of_nfc_id) {
-		ret = -ENODEV;
-		goto clk_disable;
-	}
-
-	nfc->caps = of_nfc_id->data;
-
 	platform_set_drvdata(pdev, nfc);
 
 	ret = mtk_nfc_nand_chips_init(dev, nfc);