i40evf: use capabilities flags properly

i40evf: use capabilities flags properly

Orabug: 22342532

Use the capabilities passed to us by the PF driver to control VF driver
behavior. In the process, clean up the VLAN add/remove code so it's not
a horrible morass of ifdefs.

Change-ID: I1050eaf12b658a26fea6813047c9964163c70a73
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 8ed995ff6bb9c5436db64b3653a0c62a0cd18f08)
Signed-off-by: Brian Maly <brian.maly@oracle.com>