iio: accel: kxcjk-1013: Support thresholds

This chip has a motion detect capability. Using IIO events to
specify thresholds and pushing events.
In addition a new trigger of type any-motion is added, which
pushes data to buffer only when there is any movement.

Change list:
Comments addressed for
Re: [PATCH 5/6] iio: accel: kxcjk-1013: Support thresholds
Date: 07/20/2014

- Both motion detect and data ready can be enabled together
- Sending RISING/FALLING events based on int status
- Separate interrupt configuration for data ready and motion detect

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>