dt-bindings: arm: qcom: Document sc7280 SoC and board

Document the sc7280 SoC and the IDP board bindings
Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/1615461961-17716-2-git-send-email-rnayak@codeaurora.orgSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Documentation/devicetree/bindings/arm/qcom.yaml

@@ -37,6 +37,7 @@ description: |
         msm8994
         msm8996
         sc7180
+        sc7280
         sdm630
         sdm660
         sdm845
@@ -174,6 +175,11 @@ properties:
               - qcom,sc7180-idp
           - const: qcom,sc7180
 
+      - items:
+          - enum:
+              - qcom,sc7280-idp
+          - const: qcom,sc7280
+
       - items:
           - enum:
               - xiaomi,lavender