mtd: rawnand: davinci: Inherit from nand_controller

Let's not rely on the dummy_controller embedded in nand_chip.legacy
and explicitly inherit from nand_controller instead.
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Tested-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20200513172248.141402-1-boris.brezillon@collabora.com

drivers/mtd/nand/raw/davinci_nand.c

@@ -38,6 +38,7 @@
  * outputs in a "wire-AND" configuration, with no per-chip signals.
  */
 struct davinci_nand_info {
+	struct nand_controller	controller;
 	struct nand_chip	chip;
 
 	struct platform_device	*pdev;
@@ -788,7 +789,9 @@ static int nand_davinci_probe(struct platform_device *pdev)
 	spin_unlock_irq(&davinci_nand_lock);
 
 	/* Scan to find existence of the device(s) */
-	info->chip.legacy.dummy_controller.ops = &davinci_nand_controller_ops;
+	nand_controller_init(&info->controller);
+	info->controller.ops = &davinci_nand_controller_ops;
+	info->chip.controller = &info->controller;
 	ret = nand_scan(&info->chip, pdata->mask_chipsel ? 2 : 1);
 	if (ret < 0) {
 		dev_dbg(&pdev->dev, "no NAND chip(s) found\n");