pmdomain: amlogic: Add support for S6 S7 S7D power domains controller

Add support for the S6 S7 S7D power controller, whose registers are
in the secure domain and should be accessed via SMC.

Signed-off-by: hongyu.chen1 <hongyu.chen1@amlogic.com>
Signed-off-by: Xianwei Zhao <xianwei.zhao@amlogic.com>
Link: https://lore.kernel.org/r/20250822-pm-s6-s7-s7d-v1-2-82e3f3aff327@amlogic.com


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