Bugfix: Tristate pins after acquisition.
Bugfix: Tristate pins after acquisition.

Fix a typo which lead to the data pins not being tri-stated after an
aquisition (when the GPIF is idle) but rather being driven.

Thanks Ignacio García Pérez and Clemens Novak for reporting and testing.

uffejakobsen/sigrok-firmware-fx2lafw,swegener/sigrok-firmware-fx2lafw,uffejakobsen/sigrok-firmware-fx2lafw,uffejakobsen/sigrok-firmware-fx2lafw,uffejakobsen/sigrok-firmware-fx2lafw,swegener/sigrok-firmware-fx2lafw,swegener/sigrok-firmware-fx2lafw,swegener/sigrok-firmware-fx2lafw