[flxcard] added FLX 182 support; flx-init.cpp: split Si5345 init function into...
[flxcard] added FLX 182 support; flx-init.cpp: split Si5345 init function into subfunctions to simplify initializing multiple Si5345 devices (TODO: Si570 configuration (156.25MHz) for Interlaken firmware; complete the list of FLX182 I2C devices; implement FireFly device monitoring)
Closes FLX-2100