grove.cxx: drop ADC resolution to 10bit for calculation
grove.cxx: drop ADC resolution to 10bit for calculation

Signed-off-by: Brendan Le Foll <3e0e8c4069934e8b47d99704927a85c66c0ceb33@intel.com>

MakerCollider/upm,mircea/upm,mircea/upm,pylbert/upm,andreivasiliu2211/upm,Vaghesh/upm,afmckinney/upm,arfoll/upm,g-vidal/upm,nitirohilla/upm,afmckinney/upm,rafaneri/upm,g-vidal/upm,intel-iot-devkit/upm,srware/upm,tripzero/upm,Vaghesh/upm,andreivasiliu2211/upm,yoyojacky/upm,GSmurf/upm,noahchense/upm,Propanu/upm,whbruce/upm,rafaneri/upm,izard/upm,tripzero/upm,whbruce/upm,fieldhawker/upm,skiselev/upm,yoyojacky/upm,MakerCollider/upm,intel-iot-devkit/upm,rafaneri/upm,nitirohilla/upm,srware/upm,izard/upm,jontrulson/upm,pylbert/upm,jontrulson/upm,skiselev/upm,stefan-andritoiu/upm,srware/upm,GSmurf/upm,nitirohilla/upm,Vaghesh/upm,Jon-ICS/upm,jontrulson/upm,intel-iot-devkit/upm,tylergibson/upm,intel-iot-devkit/upm,0xD34D/upm,pylbert/upm,ShawnHymel/upm,MakerCollider/upm,nitirohilla/upm,mircea/upm,fieldhawker/upm,g-vidal/upm,rafaneri/upm,andreivasiliu2211/upm,g-vidal/upm,kissbac/upm,ShawnHymel/upm,sasmita/upm,sasmita/upm,sasmita/upm,skiselev/upm,tripzero/upm,pylbert/upm,0xD34D/upm,srware/upm,kissbac/upm,ShawnHymel/upm,stefan-andritoiu/upm,spitfire88/upm,kissbac/upm,arfoll/upm,tripzero/upm,afmckinney/upm,Propanu/upm,0xD34D/upm,sasmita/upm,whbruce/upm,Propanu/upm,skiselev/upm,andreivasiliu2211/upm,kissbac/upm,arfoll/upm,yoyojacky/upm,skiselev/upm,Jon-ICS/upm,skiselev/upm,malikabhi05/upm,Propanu/upm,stefan-andritoiu/upm,sasmita/upm,yoyojacky/upm,spitfire88/upm,malikabhi05/upm,noahchense/upm,stefan-andritoiu/upm,spitfire88/upm,tylergibson/upm,MakerCollider/upm,izard/upm,jontrulson/upm,Vaghesh/upm,GSmurf/upm,Jon-ICS/upm,whbruce/upm,malikabhi05/upm,srware/upm,stefan-andritoiu/upm,g-vidal/upm,fieldhawker/upm,afmckinney/upm,arfoll/upm,afmckinney/upm,tylergibson/upm,spitfire88/upm,tylergibson/upm,intel-iot-devkit/upm,Propanu/upm,arfoll/upm,intel-iot-devkit/upm,ShawnHymel/upm,jontrulson/upm,spitfire88/upm,Propanu/upm,stefan-andritoiu/upm,pylbert/upm,tripzero/upm,fieldhawker/upm,kissbac/upm,0xD34D/upm,mircea/upm,yoyojacky/upm,Jon-ICS/upm,andreivasiliu2211/upm,tylergibson/upm,mircea/upm,GSmurf/upm,rafaneri/upm,pylbert/upm,whbruce/upm,Jon-ICS/upm,malikabhi05/upm,malikabhi05/upm,noahchense/upm,g-vidal/upm,nitirohilla/upm,malikabhi05/upm,noahchense/upm,MakerCollider/upm,ShawnHymel/upm