dt-bindings: arm: qcom: add QRD8550

Add board compatible for QRD8550 - a mobile-like development board with
SM8550.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230210163844.765074-1-krzysztof.kozlowski@linaro.org

Documentation/devicetree/bindings/arm/qcom.yaml

@@ -913,6 +913,7 @@ properties:
       - items:
           - enum:
               - qcom,sm8550-mtp
+              - qcom,sm8550-qrd
           - const: qcom,sm8550
 
   # Board compatibles go above