Abstract out the vsi close actions into a single function so they
can be used correctly for both netdev and non-netdev based VSIs.

Change-ID: I59e3d115fcb20e614a09477281b7787dd340d276
Signed-off-by: NShannon Nelson <shannon.nelson@intel.com>
Signed-off-by: NCatherine Sullivan <catherine.sullivan@intel.com>
Tested-by: NKavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>