qcacld-3.0: Add support for the NAN config items

Currently there is no inis for NAN component:
1. To configure the keep alive period for the
NDI interface.
2. To enable/disable discovery of NAN cluster with
Master Preference (MP) as 0 when a new device is
enabling NAN.

Add ini support to configure above mentioned values.

Change-Id: I47b67eb89fb8849960a9f492d2909e45b96308f3
CRs-Fixed: 2617839