qcacld-3.0: Send WLM config command for STA mode only

Currently, Host starts a 1-sec timer (WLAN_WAIT_WLM_LATENCY_LEVEL) and
sends WMI_WLM_CONFIG_CMDID to FW for non-STA device mode also. But
FW replies back with WMI_VDEV_LATENCY_LEVEL_EVENTID to report latency
level honored by FW only if HOST sends WMI_WLM_CONFIG_CMDID for STA
mode.

If host sends WMI_WLM_CONFIG_CMDID to FW for non-STA device mode,
host always observes WLAN_WAIT_WLM_LATENCY_LEVEL timeout.

Fix is to allow host to send WMI_WLM_CONFIG_CMDID to FW only if
adapter device mode is STA.

Change-Id: I3d9f588611eff0493ba3fffd05666da64c7f5da2
CRs-Fixed: 3221831

core/hdd/src/wlan_hdd_cfg80211.c

@@ -9167,12 +9167,18 @@ QDF_STATUS wlan_hdd_set_wlm_latency_level(struct hdd_adapter *adapter,
 		.dealloc = NULL,
 	};
 
+	/* ignore unless in STA mode */
+	if (adapter->device_mode != QDF_STA_MODE) {
+		hdd_debug_rl("WLM offload is supported in STA mode only");
+		return QDF_STATUS_E_FAILURE;
+	}
+
 	adapter->multi_ll_resp_expected = true;
 
 	request = osif_request_alloc(&params);
 	if (!request) {
 		hdd_err("Request allocation failure");
-		return 0;
+		return QDF_STATUS_E_FAILURE;
 	}
 	adapter->multi_ll_response_cookie = osif_request_cookie(request);
 	adapter->multi_ll_req_in_progress = true;