qcacmn: Release vdev ref in os_if_ndp_end_ind_handler

NAN vdev ref count incremented as part of end_ind handler
is not released which will result in the nan vdev not
getting physically deleted.

Fix is to release nan vdev ref in os_if_ndp_end_ind_handler.

Change-Id: I31a32fa241fb9e86d3a64d490722bc42905970c4
CRs-Fixed: 2325580
3 files changed