* host: consistency in setting packet sequence numbers
* firmware: populate packet length field when setting GPSDO cache
* both: logic for dealing with mismatching compatibility numbers
Reviewed-By: Michael West <michael.west@ettus.com>
Reviewed-By: Martin Braun <martin.braun@ettus.com>
* OctoClock can communicate with UHD over Ethernet
* Can read NMEA strings from GPSDO and send to host
* Added multi_usrp_clock class for clock devices
* uhd::device can now filter to return only USRP devices or clock devices
* New OctoClock bootloader can accept firmware download over Ethernet
* Added octoclock_burn_eeprom,octoclock_firmware_burner utilities
* Added test_clock_synch example to show clock API