dt-bindings: arm: rockchip: Add Radxa ZERO 3W/3E

Add devicetree binding documentation for Radxa ZERO 3W/3E boards.

The Radxa ZERO 3W/3E is an ultra-small, high-performance single board
computer based on the Rockchip RK3566, with a compact form factor and
rich interfaces.
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240521202810.1225636-2-jonas@kwiboo.seSigned-off-by: Heiko Stuebner <heiko@sntech.de>

Documentation/devicetree/bindings/arm/rockchip.yaml

@@ -814,6 +814,13 @@ properties:
           - const: radxa,rock-5b
           - const: rockchip,rk3588
 
+      - description: Radxa ZERO 3W/3E
+        items:
+          - enum:
+              - radxa,zero-3e
+              - radxa,zero-3w
+          - const: rockchip,rk3566
+
       - description: Rikomagic MK808 v1
         items:
           - const: rikomagic,mk808