GPIO management is pretty simple and is part of the same IP than the pin
controller for the Armada 37xx SoCs. This patch adds the GPIO support to
the pinctrl-armada-37xx.c file, it also allows sharing common functions
between the gpio and the pinctrl drivers.
Ported to U-Boot based on the Linux version by Stefan Roese.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Stefan Roese <sr@denx.de> Cc: Gregory CLEMENT <gregory.clement@free-electrons.com> Cc: Konstantin Porotchkin <kostap@marvell.com> Cc: Nadav Haklai <nadavh@marvell.com>