qcacmn: Register a DFS callback function to get AP CAC status

In Repeater AP scenario, when STA vap starts scan, it calls this
registered DFS callback function to get the AP CAC status. If the
AP vap is performing CAC, STA vap does not start SCAN.

Change-Id: Ifa3ad0298f1b04f3fffc915f20ff81ec0cc731bf
CRs-Fixed: 2096259

init_deinit/dispatcher/src/dispatcher_init_deinit.c

@@ -563,7 +563,7 @@ static QDF_STATUS dispatcher_dfs_psoc_enable(struct wlan_objmgr_psoc *psoc)
 
 static QDF_STATUS dispatcher_dfs_psoc_disable(struct wlan_objmgr_psoc *psoc)
 {
-	return QDF_STATUS_SUCCESS;
+	return wifi_dfs_psoc_disable(psoc);
 }
 #else
 static QDF_STATUS dispatcher_init_dfs(void)