dt-bindings: power: add Amlogic C3 power domains

Add devicetree binding document and related header file for Amlogic C3 secure power domains.

Signed-off-by: Xianwei Zhao <xianwei.zhao@amlogic.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230707003710.2667989-3-xianwei.zhao@amlogic.com


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