dt-bindings: mtd: rockchip: Prevent NAND chip unevaluated properties

List all the possible properties in the NAND chip as per the example and
set unevaluatedProperties to false in the NAND chip section.

Cc: Heiko Stuebner <[e-mail]>
Signed-off-by: Miquel Raynal <[e-mail]>
Reviewed-by: Rob Herring <[e-mail]>
Link: https://lore.kernel.org/linux-mtd/[e-mail]

Documentation/devicetree/bindings/mtd/rockchip,nand-controller.yaml

···
 patternProperties:
   "^nand@[0-7]$":
     type: object
+    $ref: raw-nand-chip.yaml
     properties:
       reg:
         minimum: 0
···
               RK3326, PX30
 
           Only used in combination with 'nand-is-boot-medium'.
+
+    unevaluatedProperties: false
 
 required:
   - compatible