dt-bindings: mailbox: qcom-ipcc: Add sc8280xp compatible

Document the sc8280xp compatible, and at the same time also make sure
the list is sorted alphabetically.

Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>

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

@@ -24,12 +24,13 @@ properties:
   compatible:
     items:
       - enum:
+          - qcom,sc7280-ipcc
+          - qcom,sc8280xp-ipcc
           - qcom,sm6350-ipcc
           - qcom,sm6375-ipcc
           - qcom,sm8250-ipcc
           - qcom,sm8350-ipcc
           - qcom,sm8450-ipcc
-          - qcom,sc7280-ipcc
       - const: qcom,ipcc
 
   reg: