dt-bindings: mailbox: qcom-ipcc: Add compatible for QDU1000/QRU1000

Document the compatible for the QDU1000 mailbox.

Signed-off-by: Melody Olvera <quic_molvera@quicinc.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>

Documentation/devicetree/bindings/mailbox/qcom-ipcc.yaml

@@ -24,6 +24,7 @@ properties:
   compatible:
     items:
       - enum:
+          - qcom,qdu1000-ipcc
           - qcom,sa8775p-ipcc
           - qcom,sc7280-ipcc
           - qcom,sc8280xp-ipcc