Similarly to PXA3xx and MMP2, pinctrl-single isn't capable of setting
pin direction on MMP either.
Fixes: a770d946371e ("gpio: pxa: add pin control gpio direction and request") Signed-off-by: Duje Mihanović <duje.mihanovic@skole.hr> Reviewed-by: Andy Shevchenko <andy@kernel.org> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>