firmware: implement reading of factory RF calibration values

firmware: implement reading of factory RF calibration values

Since If6e212baeb10953129fb0d5253d263567f5e12d6, we can read the TIFFS
file-system, thus we can read and use the factory RF calibration values.

  * Implement parsing of factory RF calibration values for Motorola C1xx,
    Openmoko GTA0x, Pirelli DP-L10, and upcoming FCDEV3B targets.

  * Remove the old Tx power level control code and tables, and replace
    them with new logic that exactly matches what the official chipset
    firmware (TI/FreeCalypso) does, using tables in TI/FreeCalypso
    format. Compiled-in tables serve as a fallback and match each
    target's respective original firmware.

  * Use individual AFC slope values for different targets. The original
    value was/is only correct for the Mot C1xx family, whereas
    GTA0x/FCDEV3B and Pirelli DP-L10 need different values because
    Openmoko's VCXO (copied on the FCDEV3B) and Pirelli's VCTCXO
    are different from what Motorola used.

  * Take the initial AFC DAC value for the FB search from factory
    calibration records on those targets on which it has been
    calibrated per unit at the factory.

  * Use individual APC offset for different targets instead of
    the hard-coded value. The Mot/Compal's and Pirelli's firmwares
    (both heavily modified relative to TI) use different APC offset
    settings: 32 for Compal and 0 for Pirelli, while Openmoko and
    FreeCalypso devices use 48.

Change-Id: Icf2693b751d86ec1d2563412d606c13d4c91a806
Related: OS#3582