mtd: parsers: remove reference to config MTD_NAND_TMIO

Commit 568494db ("mtd: remove tmio_nand driver") removes the config
MTD_NAND_TMIO and its corresponding driver.

Remove the reference in MTD_SHARPSL_PARTS to that removed config.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20230307074038.17391-1-lukas.bulwahn@gmail.com