stepmotor: throw exception(s) on fatal errors
stepmotor: throw exception(s) on fatal errors

Signed-off-by: Jon Trulson <08664b19c2d4086eb239dd8ec32d593676a5b9e4@ics.com>
Signed-off-by: Mihai Tudor Panu <a27de6130c5d32f5817bf40bb8b348582f37a8af@intel.com>

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