dt-bindings: arm: qcom: document MI01.6 board based on IPQ5332 family

Document the MI01.6 (Reference Design Platform 468) board based on IPQ5332
family of SoCs.

Signed-off-by: Kathiravan T <quic_kathirav@quicinc.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230323093120.20558-2-quic_kathirav@quicinc.com

Author: Kathiravan T

Documentation/devicetree/bindings/arm/qcom.yaml

@@ -86,6 +86,7 @@ description: |
         adp
         ap-al02-c7
         ap-mi01.2
+        ap-mi01.6
         cdp
         cp01-c1
         dragonboard
@@ -330,6 +331,7 @@ properties:
       - items:
           - enum:
               - qcom,ipq5332-ap-mi01.2
+              - qcom,ipq5332-ap-mi01.6
           - const: qcom,ipq5332
 
       - items: