Thank you for posting in Wired Ethernet Community.
For the required BSDL files, please register and apply for privileged access in our embedded design center. Once you've completed the access requirement, you may post the query in our embedded community for the specific link.
Embedded design center - http://www.intel.com/content/www/us/en/design/resource-design-center.html
Embedded community - https://embedded.communities.intel.com/community/en
Hope this helps.