HID: ntrig: TipSwitch for single touch mode touch.

Include TipSwitch in the touch detection decision for some single touch
firmwares.  Confidence and InRange are high for all finger events
including those used to indicate the finger is no longer in contact with
the sensor.

Signed-off-by: Rafi Rubin <rafi@seas.upenn.edu>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>