Hard coded values in `lwa_f`

[jaycedowell]

The lwa_f module from https://github.com/realtimeradio/caltech-lwa has a few hard coded values in it that are a problem:

• We seem to use a different clocksource and OVRO-LWA -> 1 (them) to 0 (us) in blocks/adc.py
• There looks to be a hard coded number of antennas -> 352*2 (them) to 64*2 (us) in snap2_fengine.py

[jaycedowell]

Upstream fix in progress at https://github.com/realtimeradio/caltech-lwa/tree/more_general

[jaycedowell]

We seem to use a different clocksource and OVRO-LWA -> 1 (them) to 0 (us) in blocks/adc.py

This seems to be fixed in caltech-lwa/more_general with the addition of the "adc_clocksource" keyword in the config. yaml files.

[jaycedowell]

There looks to be a hard coded number of antennas -> 3522 (them) to 642 (us) in snap2_fengine.py

This one as well.