dt-bindings: mtd: nand: Drop common properties already defined in generic files

generic files, so let's drop these properties from the individual NAND
controller bindings when no additional information is provided rather
than the possible presence of the property.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/linux-mtd/20221114090315.848208-5-miquel.raynal@bootlin.com