dt-bindings: arm: qcom: Add QCM6490 Fairphone 5

Fairphone 5 is a smartphone based on the QCM6490 SoC.
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230919-fp5-initial-v2-6-14bb7cedadf5@fairphone.comSigned-off-by: Bjorn Andersson <andersson@kernel.org>

Documentation/devicetree/bindings/arm/qcom.yaml

@@ -50,6 +50,7 @@ description: |
         msm8998
         qcs404
         qcm2290
+        qcm6490
         qdu1000
         qrb2210
         qrb4210
@@ -393,6 +394,11 @@ properties:
           - const: qcom,qrb2210
           - const: qcom,qcm2290
 
+      - items:
+          - enum:
+              - fairphone,fp5
+          - const: qcom,qcm6490
+
       - description: Qualcomm Technologies, Inc. Distributed Unit 1000 platform
         items:
           - enum: