dt-bindings: arm: rockchip: Add QNAP TS-433

This is a SOHO NAS with 4 hd bays and 4 GB of RAM.

Signed-off-by: Uwe Kleine-König <ukleinek@debian.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/a583992a896c80962b820803526eb593122c1692.1709034476.git.ukleinek@debian.org
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

Author: ukleinek

Documentation/devicetree/bindings/arm/rockchip.yaml

@@ -700,6 +700,11 @@ properties:
               - powkiddy,x55
           - const: rockchip,rk3566
 
+      - description: QNAP TS-433-4G 4-Bay NAS
+        items:
+          - const: qnap,ts433
+          - const: rockchip,rk3568
+
       - description: Radxa Compute Module 3(CM3)
         items:
           - enum: