dt-bindings: clock: qcom: gcc-mdm9607: Add missing "clocks" property

gcc-mdm9607.c uses "fw_name", so it requires specifying the "xo" and
"sleep_clk" clock source in the device tree. For some reason, this was
never documented in the dt-bindings. Nowadays, qcom,gcc-mdm9607 has a
dedicated schema, so we can just add it to the properties without any
additional conditionals.

Fixes: 6faa7e4ddc ("dt-bindings: clock: Add MDM9607 GCC clock bindings")
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Stephan Gerhold <stephan.gerhold@linaro.org>
Link: https://lore.kernel.org/r/20260706-qcom-clk-mdm9607-fixes-v2-10-745565101869@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

Documentation/devicetree/bindings/clock/qcom,gcc-mdm9607.yaml

@@ -25,8 +25,20 @@ properties:
     enum:
       - qcom,gcc-mdm9607
 
+  clocks:
+    items:
+      - description: XO source
+      - description: Sleep clock source
+
+  clock-names:
+    items:
+      - const: xo
+      - const: sleep_clk
+
 required:
   - compatible
+  - clocks
+  - clock-names
   - '#power-domain-cells'
 
 unevaluatedProperties: false
@@ -39,5 +51,7 @@ examples:
       #clock-cells = <1>;
       #reset-cells = <1>;
       #power-domain-cells = <1>;
+      clocks = <&xo_board>, <&sleep_clk>;
+      clock-names = "xo", "sleep_clk";
     };
 ...