mtd: rawnand: denali_dt: error out if platform has no associated data

denali->ecc_caps is a mandatory parameter. If it were left unset,
nand_ecc_choose_conf() would end up with NULL pointer access.

So, every compatible must be associated with proper denali_dt_data.
If of_device_get_match_data() returns NULL, let it fail immediately.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

drivers/mtd/nand/raw/denali_dt.c

@@ -118,11 +118,12 @@ static int denali_dt_probe(struct platform_device *pdev)
 	denali = &dt->controller;
 
 	data = of_device_get_match_data(dev);
-	if (data) {
-		denali->revision = data->revision;
-		denali->caps = data->caps;
-		denali->ecc_caps = data->ecc_caps;
-	}
+	if (WARN_ON(!data))
+		return -EINVAL;
+
+	denali->revision = data->revision;
+	denali->caps = data->caps;
+	denali->ecc_caps = data->ecc_caps;
 
 	denali->dev = dev;
 	denali->irq = platform_get_irq(pdev, 0);