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

umac/scan/dispatcher/inc/wlan_scan_public_structs.h

@@ -566,7 +566,7 @@ struct fils_filter_info {
 struct scan_filter {
 	bool bss_scoring_required;
 	bool enable_adaptive_11r;
-	uint32_t age_threshold;
+	qdf_time_t age_threshold;
 	uint32_t p2p_results;
 	uint32_t rrm_measurement_filter;
 	uint32_t num_of_bssid;

umac/scan/dispatcher/inc/wlan_scan_utils_api.h

@@ -1140,10 +1140,10 @@ util_scan_entry_wmeparam(struct scan_cache_entry *scan_entry)
  *
  * Return: age in ms
  */
-static inline uint32_t
+static inline qdf_time_t
 util_scan_entry_age(struct scan_cache_entry *scan_entry)
 {
-	unsigned long ts = scan_entry->scan_entry_time;
+	qdf_time_t ts = scan_entry->scan_entry_time;
 
 	return qdf_mc_timer_get_system_time() - ts;
 }