mtd: rawnand: r852: 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: Maxim Levitsky <maximlevitsky@gmail.com>
Link: https://lore.kernel.org/linux-mtd/20200519130035.1883-46-miquel.raynal@bootlin.com

drivers/mtd/nand/raw/r852.c

@@ -651,7 +651,8 @@ static int r852_register_nand_device(struct r852_device *dev)
 	dev->card_registered = 1;
 	return 0;
 error3:
-	nand_release(dev->chip);
+	WARN_ON(mtd_device_unregister(nand_to_mtd(dev->chip)));
+	nand_cleanup(dev->chip);
 error1:
 	/* Force card redetect */
 	dev->card_detected = 0;
@@ -670,7 +671,8 @@ static void r852_unregister_nand_device(struct r852_device *dev)
 		return;
 
 	device_remove_file(&mtd->dev, &dev_attr_media_type);
-	nand_release(dev->chip);
+	WARN_ON(mtd_device_unregister(mtd));
+	nand_cleanup(dev->chip);
 	r852_engine_disable(dev);
 	dev->card_registered = 0;
 }