dt-bindings: arm: qcom: Add QCM6490 SHIFTphone 8

The SHIFTphone 8 (codename otter) is a smartphone based on the QCM6490
SoC.
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Caleb Connolly <caleb@postmarketos.org>
Link: https://lore.kernel.org/r/20240530-otter-bringup-v3-1-79e7a28c1b08@linaro.orgSigned-off-by: Bjorn Andersson <andersson@kernel.org>

Documentation/devicetree/bindings/arm/qcom.yaml

@@ -373,6 +373,7 @@ properties:
               - fairphone,fp5
               - qcom,qcm6490-idp
               - qcom,qcs6490-rb3gen2
+              - shift,otter
           - const: qcom,qcm6490
 
       - description: Qualcomm Technologies, Inc. Distributed Unit 1000 platform