arm64: tegra: Add NVIDIA P2595 I/O board support

The NVIDIA P2595 I/O board is used in several reference designs and has
the connectors to connect the P2530 compute module to the outside world.
It features a USB 3.0 network adapter, a USB 3.0 port, an HDMI port, a
SATA port, an audio codec, a microSD card slot and a display connector,
among others.

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