pmdomain: renesas: Move Kconfig options to the pmdomain subsystem

pmdomain: renesas: Move Kconfig options to the pmdomain subsystem

The Kconfig options belongs closer to the corresponding implementations,
hence let's move them from the soc subsystem to the pmdomain subsystem.

Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Magnus Damm <magnus.damm@gmail.com>
Cc: <linux-renesas-soc@vger.kernel.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>