The 16Z127 is a 32bit GPIO controller on a MCB FPGA.
Every single line can be configured as input and output.

Push pull and open drain are supported as well as setting
a debounce value for the input lines.
Signed-off-by: NAndreas Werner <andy@wernerandy.de>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>