Put Pressure on axis 3 and stop reporting tilt etc.

These tablets don't have tilt or these other axes, so don't report on
them. Putting Pressure on axis 3 makes the tablet work with a bunch of
silly programs that think axis 3 always means pressure - like Synfig and
Inkscape (with the new input device UI). It also means less
configuration for GIMP and MyPaint since axis 3 is usually the default
for pressure.
Merge branch 'bosto_14wa' of github.com:aidyw/bosto-2g-linux-kernel-module into bosto_14wa