mfd: tc3589x: Enforce device-tree only mode

All systems using the TC3589x multifunction expander uses
devicetree, so don't clutter the place with a lot of
and assume it is there.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

diff --cc drivers/gpio/Kconfig
Simple merge

diff --cc drivers/gpio/gpio-tc3589x.c
Simple merge

diff --cc drivers/input/keyboard/tc3589x-keypad.c
Simple merge

diff --cc drivers/mfd/Kconfig
Simple merge

diff --cc drivers/mfd/tc3589x.c
Simple merge