pinctrl: renesas: r8a7790: Add VIN1-B and VIN2-G pins, groups and functions

Add pins, groups and functions for the VIN1-B [data/sync/field/clkenb/clk]
and VIN2-G8.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Ulrich Hecht <uli+renesas@fpond.eu>
Link: https://lore.kernel.org/r/20200917195924.20384-1-prabhakar.mahadev-lad.rj@bp.renesas.com


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