The following patch introduced a fix and a bug because I forgot to change
the negation:

7b3d1da4

 drv:gn412x_gpio: fix direction get/set

Here we try to fix it, definitively.

To check, do:

  cat /sys/kernel/debug/gpio

Reported-by: Dimitris Lampridis <dimitris.lampridis@cern.ch>
Signed-off-by: Federico Vaga <federico.vaga@cern.ch>