pinctrl: renesas: r8a7799[05]: Add MediaLB pins

This adds pins, groups, and functions for MediaLB devices on Renesas
R-Car E3 and D3 SoCs.

Signed-off-by: Nikita Yushchenko <nikita.yoush@cogentembedded.com>
Link: https://lore.kernel.org/r/20211225191713.2187975-1-nikita.yoush@cogentembedded.com


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