pinctrl: renesas: r8a7778: Add LBSC pins, groups, and functions

Add pins, groups, and functions for the Local Bus State Controller
(LBSC) on the Renesas R-Car M1A (R8A7778) SoC.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/347b9f7627871b45aec04a3351d50219d4d260fe.1694768311.git.geert+renesas@glider.be