pinctrl: sh-pfc: pfc-r8a7795: Fix typo in pinmux macro for SCL3

SCL3 is assigned to GPSR2 bit7 referred by IP1_23_20 macro.

Signed-off-by: Keiya Nobuta <nobuta.keiya@fujitsu.com>
Link: https://lore.kernel.org/r/20191008060619.30237-1-nobuta.keiya@fujitsu.com


Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>