util: support functions for mac/portprofile associations on hostdev

util: support functions for mac/portprofile associations on hostdev

This patch adds the following:

- functions to set and get vf configs
- Functions to replace and store vf configs (Only mac address is handled today.
  But the functions can be easily extended for vlans and other vf configs)
- function to dump link dev info (This is moved from virnetdevvportprofile.c)

Signed-off-by: Roopa Prabhu <roprabhu@cisco.com>