baseband filter calibration - caching to database

[guruofquality]

The baseband filters for RBB, RFE(TIA), and TBB should cache results in the database. Initially, we aren't looking for any fancy interpolation. Once a bandwidth is calibrated for, its RC values will be saved and applied next time.

This work will modify the existing calibration algorithms to check, retrieve, and apply RC constants from the database. If a particular bandwidth cannot be found with a few Hz of error, then the manual calibration must be performed. The result will be stored in the database.

[guruofquality]

272c8c0