qcacld-3.0: Add idle shutdown for hostapd mode stop

Because FW don't support idle pdev suspend, and when all interface down
host will not send wow enable command because wakeup is not expected.
So the idle shutdown precedure is already there to prevent system go to
idle pdev suspend state, but it only exist for station mode now, apply
it to hostapd mode as well.

Change-Id: I1b11b5bd038ea9ad23835f142e443ea11e90f55b
CRs-Fixed: 2624453

core/hdd/src/wlan_hdd_hostapd.c

@@ -534,6 +534,9 @@ static int __hdd_hostapd_stop(struct net_device *dev)
 				     WLAN_STOP_ALL_NETIF_QUEUE_N_CARRIER,
 				     WLAN_CONTROL_PATH);
 
+	if (!hdd_is_any_interface_open(hdd_ctx))
+		hdd_psoc_idle_timer_start(hdd_ctx);
+
 	hdd_exit();
 	return 0;
 }