dt-bindings: arm: amlogic: add Beelink GT1 Ultimate binding

Add the board binding for the Shenzen AZW (Beelink) GT1 Ultimate
Android Set-Top Box device.

Signed-off-by: Christian Hewitt <christianshewitt@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://lore.kernel.org/r/20220707093954.21716-1-christianshewitt@gmail.com