dt-bindings: arm: amlogic: add H96-Max bindings

Add the board binding for the Haochuangyi H96-Max STB 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/20220112022713.25962-9-christianshewitt@gmail.com