pinctrl: renesas: r8a77951: Optimize pinctrl image size for R8A774E1

This driver supports both RZ/G2H and R-Car H3 ES2 SoCs.
Optimize pinctrl image size for RZ/G2H, when support for R-Car H3 ES2
(R8A77951) is not enabled.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20201019124258.4574-2-biju.das.jz@bp.renesas.com


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