Fix jack detection on Zipit Z2, otherwise it
disables headphones output when jack is connected
Signed-off-by: NVasily Khoruzhick <anarsoul@gmail.com>
Acked-by: NMarek Vasut <marek.vasut@gmail.com>
Acked-by: NLiam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>