Removing unneccesary floating point conversions.

Removing unneccesary floating point conversions.

Remove casting uint types to float in presence bounds calculation
and using division with a single floating point constant instead.

Change-Id: I7b1738753ccec3109c698774204d3d92fde7de21
Signed-off-by: Mandeep Shetty <mandeep.shetty@intel.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/443
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Erich Keane <erich.keane@intel.com>
Reviewed-by: Sashi Penta <sashi.kumar.penta@intel.com>