dt-bindings: display: bridge: document Toshiba TC358768 cells and panel node

Inherit valid properties from the dsi-controller.
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: David Heidelberg <david@ixit.cz>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220207223911.97180-1-david@ixit.cz

Documentation/devicetree/bindings/display/bridge/toshiba,tc358768.yaml

@@ -77,7 +77,10 @@ required:
   - vddio-supply
   - ports
 
-additionalProperties: false
+allOf:
+  - $ref: ../dsi-controller.yaml#
+
+unevaluatedProperties: false
 
 examples:
   - |
@@ -87,7 +90,7 @@ examples:
       #address-cells = <1>;
       #size-cells = <0>;
 
-      dsi_bridge: dsi-bridge@e {
+      dsi_bridge: dsi@e {
         compatible = "toshiba,tc358768";
         reg = <0xe>;