pinctrl: renesas: r8a779a0: Add CANFD pins, groups and functions

This patch adds CANFD 0-7 and CANFD clock pinmux support for the
R8A779A0 (V3U) SoC.

Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Link: https://lore.kernel.org/r/20210112165929.31002-4-uli+renesas@fpond.eu


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