ASoC: renesas: rz-ssi: Enable runtime PM autosuspend support

Enable runtime PM autosuspend support. The chosen autosuspend delay is
zero for immediate autosuspend. In case there are users that need a
different autosuspend delay, it can be adjusted through sysfs.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Link: https://patch.msgid.link/20241210170953.2936724-15-claudiu.beznea.uj@bp.renesas.com


Signed-off-by: Mark Brown <broonie@kernel.org>