dt-bindings: tegra: Add Colibri T30 device tree binding documentation

Add the device tree binding documentation for Colibri T30 which was
missing so far.
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>

Documentation/devicetree/bindings/arm/tegra.txt

@@ -33,6 +33,8 @@ board-specific compatible values:
   toradex,apalis_t30
   toradex,apalis_t30-eval
   toradex,colibri_t20-512
+  toradex,colibri_t30
+  toradex,colibri_t30-eval-v3
   toradex,iris
 
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