pinctrl: renesas: rzg2l: Add input enable to the Ethernet pins

Some of the RZ/G3S Ethernet pins (P1_0, P7_0) can be configured with
input enable.  Enable this functionality for these pins.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20231207070700.4156557-8-claudiu.beznea.uj@bp.renesas.com


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