mtd: spinand: Add support for all Toshiba Memory products

Add device table for Toshiba Memory products.
Also, generalize OOB layout structure and function names.

Signed-off-by: Yoshio Furuyama <tmcmc-mb-yfuruyama7@ml.toshiba.co.jp>
Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>