dt-bindings: remoteproc: qcom,adsp: add interconnects

SM8350 ADSP Peripheral Image Loader already defines interconnects, so
document the property:

  sm8350-hdk.dtb: remoteproc@4080000: 'interconnects' does not match any of the regexes: 'pinctrl-[0-9]+'
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220517070113.18023-4-krzysztof.kozlowski@linaro.org

Documentation/devicetree/bindings/remoteproc/qcom,adsp.yaml

@@ -67,6 +67,9 @@ properties:
     minItems: 1
     maxItems: 8
 
+  interconnects:
+    maxItems: 1
+
   interrupts:
     minItems: 5
     maxItems: 6