dt-bindings: arm: qcom: document AL02-C6 board based on IPQ9574 family

Document AL02-C6 (Reference Design Platform 449) board based on IPQ9574
family of SoCs.
Signed-off-by: Devi Priya <quic_devipriy@quicinc.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230516135013.3547-2-quic_devipriy@quicinc.com

Documentation/devicetree/bindings/arm/qcom.yaml

@@ -87,6 +87,7 @@ description: |
 
         adp
         ap-al02-c2
+        ap-al02-c6
         ap-al02-c7
         ap-mi01.2
         ap-mi01.6
@@ -354,6 +355,7 @@ properties:
       - items:
           - enum:
               - qcom,ipq9574-ap-al02-c2
+              - qcom,ipq9574-ap-al02-c6
               - qcom,ipq9574-ap-al02-c7
           - const: qcom,ipq9574