pinctrl: sh-pfc: r8a7795-es1: Add USB3.0 host support

This patch adds USB3{0,1} (USB3.0 host) pinmux support to R8A7795 ES1.x
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>