dt-bindings: usb: usb-hcd: Add "tpl-support" property

The host controller device might be designed to work for the particular
products or applications. In that case its DT node is supposed to be
equipped with the tpl-support property.
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Link: https://lore.kernel.org/r/20201210090944.16283-6-Sergey.Semin@baikalelectronics.ruSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Documentation/devicetree/bindings/usb/usb-hcd.yaml

@@ -17,6 +17,12 @@ properties:
     description: Phandle of a companion device
     $ref: /schemas/types.yaml#/definitions/phandle
 
+  tpl-support:
+    description:
+      Indicates if the Targeted Peripheral List is supported for given
+      targeted hosts (non-PC hosts).
+    type: boolean
+
 additionalProperties: true
 
 examples: