dt-bindings: arm: rockchip: Add Pine64 QuarzPro64

Add devicetree binding documentation for Pine64 QuartzPro64 SBC.
Signed-off-by: Ondrej Jirman <megi@xff.cz>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231011215856.2082241-2-megi@xff.czSigned-off-by: Heiko Stuebner <heiko@sntech.de>

Documentation/devicetree/bindings/arm/rockchip.yaml

@@ -660,6 +660,11 @@ properties:
               - pine64,quartz64-b
           - const: rockchip,rk3566
 
+      - description: Pine64 QuartzPro64
+        items:
+          - const: pine64,quartzpro64
+          - const: rockchip,rk3588
+
       - description: Pine64 SoQuartz SoM
         items:
           - enum: