dt-bindings: tegra: Add Tegra234 VDK compatible

The NVIDIA Tegra234 VDK is a simulation platform for the Orin SoC. It
supports a subset of the peripherals that will be available in the final
chip and serves as a bootstrapping platform.

Reviewed-by: Jon Hunter <[e-mail]>
Signed-off-by: Thierry Reding <[e-mail]>

Documentation/devicetree/bindings/arm/tegra.yaml

···
         items:
           - const: nvidia,p3509-0000+p3668-0000
           - const: nvidia,tegra194
+      - items:
+          - enum:
+              - nvidia,tegra234-vdk
+          - const: nvidia,tegra234