pinctrl: sh-pfc: r8a77965: Add MSIOF pins, groups and functions

This patch adds MSIOF{0,1,2,3} pins, groups and functions to the
R8A77965 SoC.
Signed-off-by: NTakeshi Kihara <takeshi.kihara.df@renesas.com>
[geert: Correct MSIOF3 SS2_E comment]
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: NSimon Horman <horms+renesas@verge.net.au>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>