Information on how LLDP works on Intel® Ethernet Network Adapter I350
Unable to determine if Intel® Ethernet Network Adapter I350 supports Link Layer Discovery Protocol (LLDP).
There are no hardware hooks or Firmware enabling, it will send all the packets without differentiating, even LLDP up on the stack and if the Operating System being used supports LLDP then you call that the support exists.
Basically, LLDP information is already in the packet, there is nothing in Firmware image to provide LLDP. As long as the Operating System supports LLDP and can read it from the packet, LLDP should work (without anything to be done in the Firmware ).