mtd: rawnand: ingenic: Stop using nand_release()

This helper is not very useful and very often people get confused:
they use nand_release() instead of nand_cleanup().

Let's stop using nand_release() by calling mtd_device_unregister() and
nand_cleanup() directly.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Paul Cercueil <paul@crapouillou.net>
Cc: Harvey Hunt <harveyhuntnexus@gmail.com>
Link: https://lore.kernel.org/linux-mtd/20200519130035.1883-23-miquel.raynal@bootlin.com

drivers/mtd/nand/raw/ingenic/ingenic_nand_drv.c

@@ -387,13 +387,18 @@ static int ingenic_nand_init_chip(struct platform_device *pdev,
 
 static void ingenic_nand_cleanup_chips(struct ingenic_nfc *nfc)
 {
-	struct ingenic_nand *chip;
+	struct ingenic_nand *ingenic_chip;
+	struct nand_chip *chip;
+	int ret;
 
 	while (!list_empty(&nfc->chips)) {
-		chip = list_first_entry(&nfc->chips,
-					struct ingenic_nand, chip_list);
-		nand_release(&chip->chip);
-		list_del(&chip->chip_list);
+		ingenic_chip = list_first_entry(&nfc->chips,
+						struct ingenic_nand, chip_list);
+		chip = &ingenic_chip->chip;
+		ret = mtd_device_unregister(nand_to_mtd(chip));
+		WARN_ON(ret);
+		nand_cleanup(chip);
+		list_del(&ingenic_chip->chip_list);
 	}
 }