Chibios F4 Boards the compass calibration is stopping at 99%?

#### Issue details
I have some F4 Boards(CC3D REVO，F4BY) ,use the onboard calibration is stopping at 99%? I guess the issue is MP cannot read final calculation from flight control. I think this is actually a display issue within MP. I tried click accept, it looks like calibration successful.

#### Version
MP Version 1.3.58

#### Platform
[X] All
[ ] AntennaTracker
[ ] Copter
[ ] Plane
[ ] Rover
[ ] Sub

Start by reproducing compass calibration on an F4 board with Mission Planner 1.3.58, then inspect the calibration progress display and the final calculation result. Done means the UI accurately reports whether calibration completed instead of stopping at 99% when the calibration was successful.

Written by the indexing model from the issue text.