pinctrl: renesas: rzg2l: Add audio clock pins on RZ/G3S

Add audio clock pins on the RZ/G3S SoC.  These are used by audio IPs as
input pins to feed them with audio clocks.

Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20241113133540.2005850-6-claudiu.beznea.uj@bp.renesas.com


Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>