gpio: pxa: avoid attempting to set pin direction via pinctrl on MMP2

gpio: pxa: avoid attempting to set pin direction via pinctrl on MMP2

commit af14b2c98adb85e9517390bb88309338b9075350 upstream.

Similarly to PXA3xx, pinctrl-single can't set pin direction on MMP2 either.
See also: commit 9dabfdd84bdfa ("gpio: pxa: disable pinctrl calls for
PXA3xx")

Cc: stable@vger.kernel.org
Fixes: a770d946371e ("gpio: pxa: add pin control gpio direction and request")
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>