pmdomain: rockchip: Add smc call to inform firmware

Inform firmware to keep the power domain on or off.

Suggested-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/1738736156-119203-5-git-send-email-shawn.lin@rock-chips.com


Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>