HAL_ChibiOS: run can loop much more often

this allows for much higher ESC and servo rates, as it gives more
changes for frames to get out

libraries/AP_HAL_ChibiOS/CAN.cpp

@@ -76,8 +76,6 @@ void CANManager::_timer_tick()
 
     if (p_uavcan != nullptr) {
         p_uavcan->do_cyclic();
-    } else {
-        hal.console->printf("p_uavcan is nullptr");
     }
 }