Modified geo_sensor_hal plugin for IIO driver compatibility

Modified geo_sensor_hal plugin for IIO driver compatibility

    - The geo_sensor_hal plugin is modified as per present geo sensor IIO driver interface.
       * the plugin reads data from raw data files instead of char-dev file in /dev/ directory,
       * time stamp for data samples is not available
       * enable and disable actions for geo sensor are not available.

    - The geo sensor is enabled in the sensord.spec file

Change-Id: I8a02be99c37bae3e37f36fa4291810410fcc3976
Signed-off-by: Amit Dharmapurikar <amit.vd@samsung.com>