dt-bindings: arm: amlogic: add support for Radxa Zero2

The Radxa Zero2 is a small form-factor SBC using the Amlogic
A311D chip.

Signed-off-by: Christian Hewitt <christianshewitt@gmail.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230127150536.3719090-1-christianshewitt@gmail.com


Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>