The Kconfig belongs closer to the corresponding implementation, hence let's
move it from the soc subsystem to the pmdomain subsystem.
Cc: Walker Chen <walker.chen@starfivetech.com>
Cc: Conor Dooley <conor@kernel.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
