qcacld-3.0: Replace wmi_unified_nat_keepalive_enable()

There are multiple issues with wmi_unified_nat_keepalive_enable():
1) WMA global functions should have a wma_ prefix.
2) The function prototype indicates it should return int status, and
   the one caller, wma_add_sta_req_sta_mode(), is expecting that, but
   it actually returns QDF_STATUS.
3) The function is a very thin wrapper that calls the unified WMI API
   wmi_unified_nat_keepalive_en_cmd() and hence adds no real value.

Rather than address these issues, just remove the function and update
wma_add_sta_req_sta_mode() to directly call the unified WMI API
wmi_unified_nat_keepalive_en_cmd().

Change-Id: I13a4140ba6343240bde51704af2921c001f66a21
CRs-Fixed: 2271552

core/wma/inc/wma_internal.h

@@ -924,8 +924,6 @@ QDF_STATUS wma_unified_fw_profiling_cmd(wmi_unified_t wmi_handle,
 
 void wma_wow_tx_complete(void *wma);
 
-int wmi_unified_nat_keepalive_enable(tp_wma_handle wma, uint8_t vdev_id);
-
 int wma_unified_csa_offload_enable(tp_wma_handle wma, uint8_t vdev_id);
 
 #ifdef WLAN_FEATURE_NAN

core/wma/src/wma_dev_if.c

@@ -5135,9 +5135,9 @@ static void wma_add_sta_req_sta_mode(tp_wma_handle wma, tpAddStaParams params)
 	}
 
 	if (wmi_service_enabled(wma->wmi_handle,
-				   wmi_service_filter_ipsec_natkeepalive)) {
-		if (wmi_unified_nat_keepalive_enable(wma, params->smesessionId)
-		    < 0) {
+				wmi_service_filter_ipsec_natkeepalive)) {
+		if (wmi_unified_nat_keepalive_en_cmd(wma->wmi_handle,
+						     params->smesessionId)) {
 			WMA_LOGE("Unable to enable NAT keepalive for vdev_id:%d",
 				params->smesessionId);
 		}

core/wma/src/wma_features.c

@@ -1186,22 +1186,6 @@ void wma_check_and_set_wake_timer(uint32_t time)
 		WMA_LOGD("set key not in progress for any vdev");
 }
 
-/**
- * wmi_unified_nat_keepalive_enable() - enable NAT keepalive filter
- * @wma: wma handle
- * @vdev_id: vdev id
- *
- * Return: 0 for success or error code
- */
-int wmi_unified_nat_keepalive_enable(tp_wma_handle wma, uint8_t vdev_id)
-{
-
-	if (wmi_unified_nat_keepalive_en_cmd(wma->wmi_handle, vdev_id))
-		return QDF_STATUS_E_FAILURE;
-
-	return QDF_STATUS_SUCCESS;
-}
-
 /**
  * wma_unified_csa_offload_enable() - sen CSA offload enable command
  * @wma: wma handle