dt-bindings: arm: rockchip: add TS133 to RK356x-based QNAP NAS devices

QNAP builds a number of variants of the RK356x-based NAS design.

Add the 1-bay TS133 variant.

This one is a tiny bit special as it is based around the RK3566 variant
of the mostly similar RK3566/RK3568 SoCs.

Acked-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patch.msgid.link/20260104191448.2693309-5-heiko@sntech.de

Documentation/devicetree/bindings/arm/rockchip.yaml

@@ -894,11 +894,15 @@ properties:
           - const: rockchip,rk3568
 
       - description: QNAP TS-x33 NAS devices
-        items:
-          - enum:
-              - qnap,ts233
-              - qnap,ts433
-          - const: rockchip,rk3568
+        oneOf:
+          - items:
+              - const: qnap,ts133
+              - const: rockchip,rk3566
+          - items:
+              - enum:
+                  - qnap,ts233
+                  - qnap,ts433
+              - const: rockchip,rk3568
 
       - description: Radxa Compute Module 3 (CM3)
         items: