analog stick config options break controls

[Porcinus]

You don't need to restart at each time to test, open 2 ssh connection:
- on the first one : 'sudo dmesg -w'
- for the second, 'sudo modprobe -r mk_arcade_joystick_rpi', make your edit and 'sudo modprobe mk_arcade_joystick_rpi'

The first shell should show something like : "mk_arcade_joystick_rpi: Freeplay Button Driver" plus additionnal infos