- This patch corrects some coding style errors in the proximity
  sensor driver.
- It adds as well some logs to help debugging the driver

Change-Id: I12e81ffdc7c776a4d3fadc908b8e7190fe526efa
Tracked-On: https://jira01.devtools.intel.com/browse/AW-3821


Signed-off-by: Riadh GHADDAB <riadhx.ghaddab@intel.com>
Reviewed-on: https://android.intel.com/562776


Reviewed-by: jenkins_ndg <jenkins_ndg@intel.com>
Reviewed-by: Deverge, Jean-francoisX <jean-francoisx.deverge@intel.com>
Reviewed-by: Whitfield, MichaelX <michaelx.whitfield@intel.com>
Reviewed-by: Hu, Bingquan <bingquan.hu@intel.com>
Reviewed-by: Rouis, KhalifaX <khalifax.rouis@intel.com>
Reviewed-by: Dubray, SimonX <simonx.dubray@intel.com>
Reviewed-by: Tasayco Loarte, VictorX <victorx.tasayco.loarte@intel.com>