I updated the Pitch IM damping filter for PRM.

Previously, I found the peaking due to the control loop at around 2.3 Hz.
So I reduced the gain so that the UGF is 1 Hz.
Now, the suspension is reasonably quiet now during the DAMPING phase.

However, I also found that MIS-ALIGNED state induces so much offset that the IM seems to be rubbing somewhere.
Therefore, I tried to offload the offset in IM stage and put some offset in BF stage instead.

However again, I found that the pulses are injected randamly when there is large offset in the horizontal axis.
The coil driver is suspicious since I cannot find any pulse when there is no offset.

Now I have set -7500 cnt in IM stage and 15000 cnt in BF stage (TEST filter) and see whether the suspension can survive so far.