ASoC: renesas: rz-ssi: Use readl_poll_timeout_atomic()

Use readl_poll_timeout_atomic() instead of hardcoding something similar.
While at it replace dev_info() with dev_warn_ratelimited() as the
rz_ssi_set_idle() can also be called from IRQ context and if the SSI
idle is not properly set this is at least a warning for user.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Link: https://patch.msgid.link/20241210170953.2936724-11-claudiu.beznea.uj@bp.renesas.com


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