msm: qdsp6v2: ultrasound: extend the USF API to support new UI in ICS.

The extended API provides the USF driver with information,
required to support the following Android 4.0 UI features:
stylus input, hovering events.
The information is generated by userland based events calculators.

Change-Id: Ic6618e99228c24ae79c04787a6e034cd2f8d8cf7
Signed-off-by: Baruch Eruchimovitch <baruche@codeaurora.org>