mtd: nand: raw: rockchip_nfc: add layout structure

mtd: nand: raw: rockchip_nfc: add layout structure

The MTD framework in U-boot is not identical for drivers ported
from Linux. The rockchip_nfc driver was ported with OOB ops functions
while the framework expects a layout structure per chip.
Fix by adding a structure with OOB data and remove unused functions.

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Michael Trimarchi <michael@amarulasolutions.com>