dt-bindings: power: Add G12A NNA power domain

Add define for the NNA power domain for the NPU in the G12A.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Acked-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://lore.kernel.org/r/20221202115223.39051-3-tomeu.vizoso@collabora.com


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