linux-imx

mtd: rawnand: Make maxchips an unsigned int

There's no good reason to make maxchips a signed integer, since only
positive values are valid. Make it an unsigned int.

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