uboot-phytec

pfc: rmobile: Add hook to configure pin as GPIO

Add hook into the PFC driver to allow the GPIO driver to toggle
GPSR registers into GPIO mode when GPIO is requested.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>