pinctrl: sh-pfc: r8a77965: Add USB3.0 host pins, groups and functions

This patch adds USB30 (USB3.0 host) pin, group and function to
the R8A77965 SoC.

Signed-off-by: Takeshi Kihara <takeshi.kihara.df@renesas.com>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>