i40e: report VF link state correctly

Although the driver would correctly allow the VF link state to be
controlled by 'ip set link', it would not report it correctly back.

Fix this by filling out the appropriate field in the vf info struct.

Change-ID: I58d8e356438190e1ee9660b424301af6f416cdbe
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Signed-off-by: Catherine Sullivan <catherine.sullivan@intel.com>
Tested-by: Sibai Li <sibai.li@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>