dt-bindings: remoteproc: imx_rproc: add fsl,auto-boot property

Add an optional property "fsl,auto-boot" to indicate remote processor
auto boot.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/1620274123-1461-2-git-send-email-peng.fan@oss.nxp.comSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml

@@ -49,6 +49,12 @@ properties:
     minItems: 1
     maxItems: 32
 
+  fsl,auto-boot:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description:
+      Indicate whether need to load the default firmware and start the remote
+      processor automatically.
+
 required:
   - compatible
   - clocks