qcacld-3.0: Fix kernel checkpatch warnings in wlan_hdd_tx_rx.h

Fix kernel checkpatch warnings in wlan_hdd_tx_rx.h.

Change-Id: Idbda778a8d22b31ddd5657d116c035f202e998af
CRs-Fixed: 2024274

core/hdd/inc/wlan_hdd_tx_rx.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2016 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2013-2017 The Linux Foundation. All rights reserved.
  *
  * Previously licensed under the ISC license by Qualcomm Atheros, Inc.
  *
@@ -82,26 +82,21 @@ void hdd_get_tx_resource(hdd_adapter_t *adapter,
 #else
 static inline void hdd_tx_resume_cb(void *adapter_context, bool tx_resume)
 {
-	return;
 }
 static inline void hdd_tx_resume_timer_expired_handler(void *adapter_context)
 {
-	return;
 }
 static inline void hdd_register_tx_flow_control(hdd_adapter_t *adapter,
 		qdf_mc_timer_callback_t timer_callback,
 		ol_txrx_tx_flow_control_fp flowControl)
 {
-	return;
 }
 static inline void hdd_deregister_tx_flow_control(hdd_adapter_t *adapter)
 {
-	return;
 }
 static inline void hdd_get_tx_resource(hdd_adapter_t *adapter,
 			uint8_t STAId, uint16_t timer_value)
 {
-	return;
 }
 #endif /* QCA_LL_LEGACY_TX_FLOW_CONTROL */