mtd: rawnand: toshiba: Set the pairing scheme for TC58TEG5DCLTA00

TC58TEG5DCLTA00 uses a stride of 3 between its lower and upper page.
Set the appropriate pairing scheme at init time.

Signed-off-by: Boris Brezillon <bbrezillon@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20200503155341.16712-4-miquel.raynal@bootlin.com