Included per-bit calibration in ADC calibration routine.

Was commented out, but pure mmcm phase sweep is not effective
(particularly since there seems to be a bug where zeros at the
start of the phase sweep are always chosen as best phase,
even if there are much larger runs of zero later. (This might
have already been fixed in sma-wideband repo))
Merge branch 'master' of https://github.com/jack-h/ami_correlator_sw