pinctrl: renesas: rzg2l: Pass pincontrol device to pinconf_generic_parse_dt_config()

pinctrl: renesas: rzg2l: Pass pincontrol device to pinconf_generic_parse_dt_config()

Pass the pincontrol device pointer to pinconf_generic_parse_dt_config()
in preparation for passing custom params.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com> # on RZ/G3S
Link: https://lore.kernel.org/r/20240530173857.164073-13-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>