pinctrl: sh-pfc: r8a7779: Add HSCIF0/1 pins

Adds HSCIF0 and HSCIF1 pins, groups and functions for R8A7779.

Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>