Support custom PWM update rates
Support custom PWM update rates

Rates of 50 to 400 can be specified using the -u <rate in hz> parameter
with the fmu command in the startup script.

darknight-007/Firmware,jlecoeur/Firmware,acfloria/Firmware,dagar/Firmware,darknight-007/Firmware,Aerotenna/Firmware,darknight-007/Firmware,mje-nz/PX4-Firmware,acfloria/Firmware,krbeverx/Firmware,Aerotenna/Firmware,mje-nz/PX4-Firmware,Aerotenna/Firmware,mcgill-robotics/Firmware,dagar/Firmware,acfloria/Firmware,dagar/Firmware,acfloria/Firmware,krbeverx/Firmware,jlecoeur/Firmware,Aerotenna/Firmware,dagar/Firmware,acfloria/Firmware,krbeverx/Firmware,krbeverx/Firmware,dagar/Firmware,mje-nz/PX4-Firmware,PX4/Firmware,jlecoeur/Firmware,jlecoeur/Firmware,PX4/Firmware,krbeverx/Firmware,mcgill-robotics/Firmware,mcgill-robotics/Firmware,Aerotenna/Firmware,darknight-007/Firmware,krbeverx/Firmware,jlecoeur/Firmware,PX4/Firmware,krbeverx/Firmware,PX4/Firmware,jlecoeur/Firmware,dagar/Firmware,acfloria/Firmware,Aerotenna/Firmware,mje-nz/PX4-Firmware,darknight-007/Firmware,mje-nz/PX4-Firmware,mcgill-robotics/Firmware,jlecoeur/Firmware,PX4/Firmware,mje-nz/PX4-Firmware,mje-nz/PX4-Firmware,PX4/Firmware,mcgill-robotics/Firmware,Aerotenna/Firmware,acfloria/Firmware,mcgill-robotics/Firmware,mcgill-robotics/Firmware,dagar/Firmware,PX4/Firmware,jlecoeur/Firmware