Bugfix: corrects the ARR calculation for the LED PWM timer
Bugfix: corrects the ARR calculation for the LED PWM timer

The calculation of the ARR on the LED PWM timer did not subtract 1
from the timer period calculation to get the ARR value.

PX4/Firmware,acfloria/Firmware,mje-nz/PX4-Firmware,acfloria/Firmware,mcgill-robotics/Firmware,mje-nz/PX4-Firmware,jlecoeur/Firmware,PX4/Firmware,jlecoeur/Firmware,dagar/Firmware,dagar/Firmware,mcgill-robotics/Firmware,Aerotenna/Firmware,dagar/Firmware,PX4/Firmware,Aerotenna/Firmware,jlecoeur/Firmware,krbeverx/Firmware,acfloria/Firmware,PX4/Firmware,Aerotenna/Firmware,dagar/Firmware,mje-nz/PX4-Firmware,Aerotenna/Firmware,Aerotenna/Firmware,dagar/Firmware,PX4/Firmware,mje-nz/PX4-Firmware,PX4/Firmware,acfloria/Firmware,krbeverx/Firmware,mcgill-robotics/Firmware,krbeverx/Firmware,jlecoeur/Firmware,jlecoeur/Firmware,mje-nz/PX4-Firmware,jlecoeur/Firmware,krbeverx/Firmware,dagar/Firmware,PX4/Firmware,krbeverx/Firmware,dagar/Firmware,krbeverx/Firmware,mcgill-robotics/Firmware,acfloria/Firmware,jlecoeur/Firmware,acfloria/Firmware,mcgill-robotics/Firmware,Aerotenna/Firmware,acfloria/Firmware,krbeverx/Firmware,Aerotenna/Firmware,jlecoeur/Firmware,mje-nz/PX4-Firmware,mcgill-robotics/Firmware,mje-nz/PX4-Firmware,mcgill-robotics/Firmware