dt-bindings: nvmem: qfprom: Add optional power-domains property

qfprom devices on some SoCs need to vote on the performance state
of a power-domain, so add the power-domains optional property to the
bindings
Reviewed-by: NDouglas Anderson <dianders@chromium.org>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NRajendra Nayak <rnayak@codeaurora.org>
Signed-off-by: NSrinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20210806085947.22682-2-srinivas.kandagatla@linaro.orgSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/devicetree/bindings/nvmem/qcom,qfprom.yaml

@@ -51,6 +51,9 @@ properties:
   vcc-supply:
     description: Our power supply.
 
+  power-domains:
+    maxItems: 1
+
   # Needed if any child nodes are present.
   "#address-cells":
     const: 1