gpio: moxart: Actually set output state in moxart_gpio_direction_output()

moxart_gpio_direction_output() ignored the state passed into it. Fix it.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>