dt-bindings: arm: qcom: document sc7280 and evoker board

This adds Chromebook Evoker to the yaml.
Signed-off-by: Sheng-Liang Pan <sheng-liang.pan@quanta.corp-partner.google.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220902160845.v5.1.Ief93544cd0cbfa412092f5de92de10d59a2a5b3a@changeid

Documentation/devicetree/bindings/arm/qcom.yaml

@@ -570,6 +570,11 @@ properties:
           - const: google,piglin
           - const: qcom,sc7280
 
+      - description: Google Evoker (newest rev)
+        items:
+          - const: google,evoker
+          - const: qcom,sc7280
+
       - description: Google Herobrine (newest rev)
         items:
           - const: google,herobrine