This header file will be removed soon.

Copy the helper macro RCAR_GP_PIN(), which is used by the pinctrl
drivers only, to sh_pfc.h, and drop the #include.
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>