dt-bindings: net: qcom,ethqos: add description for qcs615

Add compatible for the MAC controller on qcs615 platform.
Since qcs615 shares the same EMAC as sm8150, so it fallback to that
compatible.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Yijie Yang <quic_yijiyang@quicinc.com>
Link: https://patch.msgid.link/20241029-schema-v3-1-fbde519eaf00@quicinc.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/devicetree/bindings/net/qcom,ethqos.yaml

@@ -18,11 +18,16 @@ allOf:
 
 properties:
   compatible:
-    enum:
-      - qcom,qcs404-ethqos
-      - qcom,sa8775p-ethqos
-      - qcom,sc8280xp-ethqos
-      - qcom,sm8150-ethqos
+    oneOf:
+      - items:
+          - enum:
+              - qcom,qcs615-ethqos
+          - const: qcom,sm8150-ethqos
+      - enum:
+          - qcom,qcs404-ethqos
+          - qcom,sa8775p-ethqos
+          - qcom,sc8280xp-ethqos
+          - qcom,sm8150-ethqos
 
   reg:
     maxItems: 2