pinctrl: renesas: r8a779g0: Tidy up ioctrl_regs

Remove POC2 which is not documented, and remove TD0SEL3 which is not
needed.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/874k01txy9.wl-kuninori.morimoto.gx@renesas.com


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