i40e: Display LLDP information on vSphere Web Client

This patch enables driver to display LLDP information on the vSphere Web
Client with Intel adapters (X710, XL710) and Distributed Virtual Switch.

Signed-off-by: Upasana Menon <upasana.menon@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>