pinctrl: sh-pfc: r8a77990: Add HSCIF pins, groups, and functions

This patch adds HSCIF{0,1,2,3,4} pins, groups and functions to
the R8A77990 SoC.

Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com>
Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>