detect whether a switch is a low-jitter version
As today, the only way to detect whether a switch is a low-jitter (LJ) version is to run lm32-vuart. On LJ switch there is an entry at the beginning of the output:
--- WRS Low jitter board detected. ---
Use a register in FPGA to report presence of LJ or export in status structure from lm32. Then export this information via SNMP.