ARM: 6354/1: nomadik-gpio: allow control of sleep mode direction and pull up

DB8500v2 allows control of direction and pull up/down configuration in
sleep mode, instead of switching the pin to input with pull up/down
enabled.

Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>