BugLink: http://bugs.launchpad.net/bugs/1536473

This is the same patch as for ixgbe but applied differently according to
busy polling.  See commit 5d6002b7 ("ixgbe: Fix handling of NAPI
budget when multiple queues are enabled per vector")
Signed-off-by: William Dauchy <william@gandi.net>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
(cherry picked from commit d0f71aff)
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>