nunchuck: Adding doxygen comments
nunchuck: Adding doxygen comments

Signed-off-by: John Van Drasek <514c174da16cb65a89688761b233d923b6282d4d@intel.com>

malikabhi05/upm,fieldhawker/upm,nitirohilla/upm,whbruce/upm,Vaghesh/upm,andreivasiliu2211/upm,tylergibson/upm,afmckinney/upm,tylergibson/upm,arfoll/upm,pylbert/upm,ShawnHymel/upm,jontrulson/upm,yoyojacky/upm,rafaneri/upm,nitirohilla/upm,pylbert/upm,Propanu/upm,srware/upm,whbruce/upm,srware/upm,spitfire88/upm,whbruce/upm,kissbac/upm,afmckinney/upm,kissbac/upm,skiselev/upm,g-vidal/upm,spitfire88/upm,intel-iot-devkit/upm,intel-iot-devkit/upm,g-vidal/upm,GSmurf/upm,MakerCollider/upm,spitfire88/upm,jontrulson/upm,malikabhi05/upm,intel-iot-devkit/upm,tripzero/upm,Jon-ICS/upm,stefan-andritoiu/upm,andreivasiliu2211/upm,noahchense/upm,skiselev/upm,malikabhi05/upm,arfoll/upm,rafaneri/upm,ShawnHymel/upm,afmckinney/upm,MakerCollider/upm,Propanu/upm,sasmita/upm,ShawnHymel/upm,Jon-ICS/upm,nitirohilla/upm,tripzero/upm,rafaneri/upm,GSmurf/upm,g-vidal/upm,Vaghesh/upm,kissbac/upm,rafaneri/upm,sasmita/upm,andreivasiliu2211/upm,afmckinney/upm,intel-iot-devkit/upm,afmckinney/upm,yoyojacky/upm,nitirohilla/upm,tripzero/upm,sasmita/upm,kissbac/upm,Propanu/upm,andreivasiliu2211/upm,arfoll/upm,Propanu/upm,arfoll/upm,skiselev/upm,arfoll/upm,pylbert/upm,skiselev/upm,ShawnHymel/upm,stefan-andritoiu/upm,stefan-andritoiu/upm,malikabhi05/upm,nitirohilla/upm,intel-iot-devkit/upm,spitfire88/upm,GSmurf/upm,Propanu/upm,jontrulson/upm,andreivasiliu2211/upm,tripzero/upm,stefan-andritoiu/upm,jontrulson/upm,g-vidal/upm,srware/upm,GSmurf/upm,yoyojacky/upm,sasmita/upm,sasmita/upm,noahchense/upm,mircea/upm,stefan-andritoiu/upm,stefan-andritoiu/upm,MakerCollider/upm,noahchense/upm,fieldhawker/upm,jontrulson/upm,Propanu/upm,tylergibson/upm,yoyojacky/upm,tylergibson/upm,spitfire88/upm,pylbert/upm,srware/upm,MakerCollider/upm,Jon-ICS/upm,Jon-ICS/upm,Vaghesh/upm,fieldhawker/upm,skiselev/upm,mircea/upm,malikabhi05/upm,pylbert/upm,MakerCollider/upm,malikabhi05/upm,srware/upm,whbruce/upm,ShawnHymel/upm,mircea/upm,rafaneri/upm,fieldhawker/upm,g-vidal/upm,yoyojacky/upm,intel-iot-devkit/upm,skiselev/upm,whbruce/upm,tripzero/upm,Jon-ICS/upm,g-vidal/upm,mircea/upm,pylbert/upm,kissbac/upm,Vaghesh/upm,tylergibson/upm,noahchense/upm,mircea/upm