This touchpad has firmware that seems to buffer events. In the words of the
reporter:

  In usage, it feels like motions vary between smooth and choppy; slow
  movements are smooth and quick movements are choppy. It's as if the
  touchpad aggregates quick movements and sends one big movement instead
  of sending discrete events. To make the movement more natural, the
  events preceding the jump should be of higher magnitude and the jump
  less pronounced, but that's just not how the touchpad works, it seems.

In the actual event data this looks exactly like a pointer jump: small
movements, one big one, then small ones again. If we filter that large
movement out we prevent the user from moving quickly.

There's no way to detect this or work around this, so let's add a quirk that
disables the jump detection for this device.

Fixes #506



Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>