arm64: tegra: Add NVIDIA Jetson AGX Orin Developer Kit support

The Jetson AGX Orin Developer Kit is a continuation of the Jetson
Developer Kit line using the new NVIDIA Tegra234 (Orin) SoC.

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>