qcacld-3.0: Fix NULL VDEV point during peer remove in monitor mode

After gerrit#2436786, vdev in monitor mode is removed from vdev
list of pdev. So it is needed to use the new cdp api, which is
cdp_get_mon_vdev_from_pdev in stead of cdp_get_vdev_from_vdev_id
in monitor mode to register vdev.

CRs-Fixed: 2359997
Change-Id: I75cad531e161748a3830104516e44079dee636ec
1 file changed