dt-bindings: mtd: nuvoton,ma35d1-nand: add new bindings

Add dt-bindings for the Nuvoton MA35 SoC NAND Controller.

Signed-off-by: Hui-Ping Chen <hpchen0nvt@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>