dt-bindings: tegra: Document compatible for IGX

Document the compatible strings used for Nvidia IGX Orin Development
kit which uses P3701 SKU8 and P3740 carrier board.
Signed-off-by: Shubhi Garg <shgarg@nvidia.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>

Documentation/devicetree/bindings/arm/tegra.yaml

@@ -167,6 +167,11 @@ properties:
           - const: nvidia,p3737-0000+p3701-0000
           - const: nvidia,p3701-0000
           - const: nvidia,tegra234
+      - description: NVIDIA IGX Orin Development Kit
+        items:
+          - const: nvidia,p3740-0002+p3701-0008
+          - const: nvidia,p3701-0008
+          - const: nvidia,tegra234
       - description: Jetson Orin NX
         items:
           - const: nvidia,p3767-0000