dt-bindings: arm: rockchip: Add Radxa ROCK 4SE

Add devicetree binding entry for the Radxa ROCK 4SE.
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Christopher Obbard <chris.obbard@collabora.com>
Link: https://lore.kernel.org/r/20230710115025.507439-3-chris.obbard@collabora.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

Documentation/devicetree/bindings/arm/rockchip.yaml

@@ -694,6 +694,11 @@ properties:
           - const: radxa,rock-4c-plus
           - const: rockchip,rk3399
 
+      - description: Radxa ROCK 4SE
+        items:
+          - const: radxa,rock-4se
+          - const: rockchip,rk3399
+
       - description: Radxa ROCK Pi E
         items:
           - const: radxa,rockpi-e