i40e/i40evf: clean up error messages

i40e/i40evf: clean up error messages

BugLink: http://bugs.launchpad.net/bugs/1536474
Clean up and enhance error messages related to VF MAC/VLAN filters.
Indicate which VF is having issues, and if possible indicate the MAC
address or VLAN involved.

Also, when an error is returned from the PF driver, print useful
information about what went wrong, for the most likely cases.

Change-ID: Ib3d15eef9e3369a78fd142948671e5fa26d921b8
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
(cherry picked from commit 8d8f2295d0752230e0a697af33e5af96561b64a0)
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>