qcacmn: Add handlers for scan queue in scheduler core

Add scheduler message handler function for QDF_MODULE_ID_SCAN queue.

Also post scan beacon/probe frames and scan events to SCAN queue instead
of TARGET_IF queue.

Change-Id: I94e3ea2f0eb5c9592f5cfcd91738778fa65ba815
CRs-Fixed: 2214554

scheduler/inc/scheduler_api.h

@@ -1,8 +1,5 @@
 /*
- * Copyright (c) 2014-2017 The Linux Foundation. All rights reserved.
- *
- * Previously licensed under the ISC license by Qualcomm Atheros, Inc.
- *
+ * Copyright (c) 2014-2018 The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -19,11 +16,6 @@
  * PERFORMANCE OF THIS SOFTWARE.
  */
 
-/*
- * This file was originally distributed by Qualcomm Atheros, Inc.
- * under proprietary terms before Copyright ownership was assigned
- * to the Linux Foundation.
- */
 #if !defined(__SCHEDULER_API_H)
 #define __SCHEDULER_API_H
 
@@ -242,6 +234,15 @@ QDF_STATUS scheduler_os_if_mq_handler(struct scheduler_msg *msg);
  */
 QDF_STATUS scheduler_timer_q_mq_handler(struct scheduler_msg *msg);
 
+/**
+ * scheduler_scan_mq_handler() - top level message queue handler for
+ *                               scan queue
+ * @msg: pointer to actual message being handled
+ *
+ * Return: QDF status
+ */
+QDF_STATUS scheduler_scan_mq_handler(struct scheduler_msg *msg);
+
 /**
  * scheduler_register_wma_legacy_handler() - register legacy wma handler
  * @callback: legacy wma handler to be called for WMA messages