qcacmn: Add interface to write string of CFR stopping

Add a interface to write string of CFR stopping, and indicate to
userspace that CFR has stopped.

Change-Id: Ib1d63cb75cd311b367d5d8100c5c4eb92980392d
CRs-Fixed: 2659373

umac/cfr/dispatcher/inc/wlan_cfr_ucfg_api.h

@@ -96,6 +96,16 @@ int ucfg_cfr_set_timer(struct wlan_objmgr_pdev *pdev, uint32_t value);
  */
 int ucfg_cfr_get_timer(struct wlan_objmgr_pdev *pdev);
 
+/**
+ * ucfg_cfr_stop_indication() - User space API to write cfr stop string
+ * @vdev - pointer to vdev object
+ *
+ * Write stop string and indicate to up layer.
+ *
+ * Return: status of write CFR stop string
+ */
+QDF_STATUS ucfg_cfr_stop_indication(struct wlan_objmgr_vdev *vdev);
+
 #ifdef WLAN_ENH_CFR_ENABLE
 /* Channel capture recipe filters */
 enum capture_type {

umac/cfr/dispatcher/src/wlan_cfr_ucfg_api.c

@@ -311,6 +311,16 @@ int ucfg_cfr_list_peers(struct wlan_objmgr_pdev *pdev)
 	return 0;
 }
 
+QDF_STATUS ucfg_cfr_stop_indication(struct wlan_objmgr_vdev *vdev)
+{
+	if (!vdev) {
+		cfr_err("null vdev");
+		return QDF_STATUS_E_INVAL;
+	}
+
+	return cfr_stop_indication(vdev);
+}
+
 #ifdef WLAN_ENH_CFR_ENABLE
 
 static inline