dt-bindings: remoteproc: qcom,pil-info: add missing imem compatible

syscon and simple-mfd cannot be used without device specific compatible.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220817142246.828762-4-krzysztof.kozlowski@linaro.orgSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/remoteproc/qcom,pil-info.yaml

@@ -30,7 +30,7 @@ additionalProperties: false
 examples:
   - |
     imem@146bf000 {
-      compatible = "syscon", "simple-mfd";
+      compatible = "qcom,sdm630-imem", "syscon", "simple-mfd";
       reg = <0x146bf000 0x1000>;
 
       #address-cells = <1>;