qcacmn: Expose scan_backoff_multiplier for NLO/PNO

For Network Listen Offload and Perfered Network Offload, the fast scan
period is multiplied by scan_backoff_multiplier after max cycles have
occurred. Expose scan_backoff_multiplier to consumers of the WMI API,
so this parameter can be configured.

Change-Id: I478fb61cd096d3496205f4ff556e180dabf99b77
CRs-Fixed: 2035201

os_if/linux/scan/inc/wlan_cfg80211_scan.h

@@ -117,12 +117,14 @@ struct scan_req {
  * @pdev: pdev pointer
  * @dev: Pointer network device
  * @request: Pointer to cfg80211 scheduled scan start request
+ * @scan_backoff_multiplier: multiply scan period by this after max cycles
  *
  * Return: 0 for success, non zero for failure
  */
 int wlan_cfg80211_sched_scan_start(struct wlan_objmgr_pdev *pdev,
 	struct net_device *dev,
-	struct cfg80211_sched_scan_request *request);
+	struct cfg80211_sched_scan_request *request,
+	uint8_t scan_backoff_multiplier);
 
 /**
  * wlan_cfg80211_sched_scan_stop() - cfg80211 scheduled scan(pno) stop

os_if/linux/scan/src/wlan_cfg80211_scan.c

@@ -140,7 +140,7 @@ static void wlan_cfg80211_pno_callback(struct wlan_objmgr_vdev *vdev,
 	pdev_ospriv = wlan_pdev_get_ospriv(pdev);
 	wlan_pdev_obj_unlock(pdev);
 	if (!pdev_ospriv) {
-		cfg80211_err("pdev_osprivis NULL");
+		cfg80211_err("pdev_ospriv is NULL");
 		return;
 	}
 	cfg80211_sched_scan_results(pdev_ospriv->wiphy);
@@ -181,7 +181,8 @@ static QDF_STATUS wlan_cfg80211_is_pno_allowed(struct wlan_objmgr_vdev *vdev)
 
 int wlan_cfg80211_sched_scan_start(struct wlan_objmgr_pdev *pdev,
 	struct net_device *dev,
-	struct cfg80211_sched_scan_request *request)
+	struct cfg80211_sched_scan_request *request,
+	uint8_t scan_backoff_multiplier)
 {
 	struct pno_scan_req_params *req;
 	int i, j, ret = 0;
@@ -342,6 +343,7 @@ int wlan_cfg80211_sched_scan_start(struct wlan_objmgr_pdev *pdev,
 	 */
 	wlan_config_sched_scan_plan(req, request);
 	req->delay_start_time = hdd_config_sched_scan_start_delay(request);
+	req->scan_backoff_multiplier = scan_backoff_multiplier;
 	cfg80211_notice("Base scan interval: %d sec, scan cycles: %d, slow scan interval %d",
 		req->fast_scan_period, req->fast_scan_max_cycles,
 		req->slow_scan_period);