i40evf: support packet split receive

i40evf: support packet split receive

BugLink: http://bugs.launchpad.net/bugs/1547674
Support packet split receive on VFs. This is off by default but can be
enabled using ethtool private flags. Because we need to trigger a reset
from outside of i40evf_main.c, create a new function to do so, and
export it.

Also update copyright year in file headers.

Change-ID: I721aa5d70113d3d6d94102e5f31526f6fc57cbbb
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 net-next commit 00e5ec4bcc4aa3d4663502b5377e17ea43e058d6)
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>