qcacld-3.0: Start bus bw computer timer for NAN

Currently for NDI interface bus bandwidth timer is not
started. As part of this change start the timer when new
ndp peer is created and stop the timer when last ndp peer
connected is deleted.

Change-Id: Ia710ec9872636ee3cefa30815692c2f8c9816687
CRs-Fixed: 2499548
5 files changed