qcacmn: Add filter logic according to timestamp in scan

Currently the driver does not have any mechanism to filter
out the scan results according to the age.

Add a logic in the scan filter API, to filter out the scan
result according to the age threshold, so that APs which
are older than a particular value are filtered out.

Change-Id: If3f4b372b28a0f75b1d70915df4e3e1a7e518931
CRs-Fixed: 2447988
5 files changed