qcacmn: Fix multiple radar founds for a single burst

In dfs test mode, 18 pulses are injected in a single burst, the host
driver reports the radar found event two or three times to
upper layer. For a single burst of radar pulses, radar found event
should be reported only once.

Fix the multiple radar founds for a single burst by disabling radar
detection and flushing the existing radar pulses from all queues
while processing the current radar found indication event in dfs test
mode (usenol=0).

Change-Id: I70c7c15147a5cde038773fd97735c113ca385932
CRs-Fixed: 2981217

umac/dfs/dispatcher/inc/wlan_dfs_utils_api.h

@@ -968,4 +968,15 @@ QDF_STATUS dfs_init_chan_state_array(struct wlan_objmgr_pdev *pdev)
 	return QDF_STATUS_E_NOSUPPORT;
 }
 #endif /* WLAN_DISP_CHAN_INFO */
+
+/**
+ * utils_dfs_radar_enable() - Enables the radar.
+ * @pdev: Pointer to DFS pdev object.
+ *
+ * This is called each time for eCSA occurs but don't change channel due
+ * to channel switch disabled in dfs test mode.
+ *
+ * Return: QDF_STATUS.
+ */
+QDF_STATUS utils_dfs_radar_enable(struct wlan_objmgr_pdev *pdev);
 #endif /* _WLAN_DFS_UTILS_API_H_ */

umac/dfs/dispatcher/src/wlan_dfs_utils_api.c

@@ -1583,3 +1583,8 @@ QDF_STATUS utils_dfs_update_chan_state_array(struct wlan_objmgr_pdev *pdev,
 	return utils_dfs_update_chan_state_array_element(dfs, freq, state);
 }
 #endif /* WLAN_DISP_CHAN_INFO */
+
+QDF_STATUS utils_dfs_radar_enable(struct wlan_objmgr_pdev *pdev)
+{
+	return tgt_dfs_radar_enable(pdev, 0, 0, true);
+}