linux-imx

mtd: rawnand: sunxi: Name nand_chip objects consistently

nand_chip objects are sometimes called chip and sometimes nand. Rename
all of them into nand to make things consistent.

Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>