dt-bindings: arm: rockchip: Add Edgeble Neural Compute Module 6B

Neural Compute Module 6B(Neu6B) is a 96boards SoM-CB compute module
based on Rockchip RK3588J from Edgeble AI.

Edgeble Neural Compute Module 6B(Neu6B) IO board is an industrial
form factor evaluation board from Edgeble AI.

Neu6B needs to mount on top of this IO board in order to create complete
Edgeble Neural Compute Module 6B(Neu6B) IO platform.

This patch add dt-bindings for Edgeble Neu6 Model B SoM based IO board.
Signed-off-by: Jagan Teki <jagan@edgeble.ai>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230516163454.997736-1-jagan@edgeble.aiSigned-off-by: Heiko Stuebner <heiko@sntech.de>

Documentation/devicetree/bindings/arm/rockchip.yaml

@@ -107,6 +107,12 @@ properties:
           - const: edgeble,neural-compute-module-6a     # Edgeble Neural Compute Module 6A SoM
           - const: rockchip,rk3588
 
+      - description: Edgeble Neural Compute Module 6(Neu6) Model B SoM based boards
+        items:
+          - const: edgeble,neural-compute-module-6b-io  # Edgeble Neural Compute Module 6B IO Board
+          - const: edgeble,neural-compute-module-6b     # Edgeble Neural Compute Module 6B SoM
+          - const: rockchip,rk3588
+
       - description: Elgin RV1108 R1
         items:
           - const: elgin,rv1108-r1