i40e: un-disable VF after reset

i40e: un-disable VF after reset

Orabug: 21570582

When a VF is disabled, there is no way for it to recover until either
the PF driver is reloaded or SR-IOV is disabled and enabled. To correct
this, enable the VF after a successful reset.

Change-ID: I9e0788476c4d53d5407961b503febdfff2b8a7c6
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Tested-by: Jim Young <james.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
(cherry picked from commit 5b8f8505d37c63d492391e5fafcd43332671b36b)
Signed-off-by: Brian Maly <brian.maly@oracle.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>