qcacmn: Featurize WLAN_FEATURE_LINK_LAYER_STATS

Featurize WLAN_FEATURE_LINK_LAYER_STATS to compile out in mission mode.

Change-Id: I16b7ffe869f6e46736693a02b58954a50e31b03b
CRs-Fixed: 2244583
diff --git a/wmi_unified_api.c b/wmi_unified_api.c
index f0772d0..9640ab8 100644
--- a/wmi_unified_api.c
+++ b/wmi_unified_api.c
@@ -1860,6 +1860,7 @@
 	return QDF_STATUS_E_FAILURE;
 }
 
+#ifdef WLAN_FEATURE_LINK_LAYER_STATS
 /**
  * wmi_unified_process_ll_stats_clear_cmd() - clear link layer stats
  * @wmi_hdl: wmi handle
@@ -1900,6 +1901,7 @@
 
 	return QDF_STATUS_E_FAILURE;
 }
+#endif /* WLAN_FEATURE_LINK_LAYER_STATS */
 
 /**
  * wmi_unified_congestion_request_cmd() - send request to fw to get CCA
@@ -1920,6 +1922,7 @@
 	return QDF_STATUS_E_FAILURE;
 }
 
+#ifdef WLAN_FEATURE_LINK_LAYER_STATS
 /**
  * wmi_unified_process_ll_stats_set_cmd() - link layer stats set request
  * @wmi_handle:       wmi handle
@@ -1938,6 +1941,7 @@
 
 	return QDF_STATUS_E_FAILURE;
 }
+#endif /* WLAN_FEATURE_LINK_LAYER_STATS */
 
 /**
  * wmi_unified_snr_request_cmd() - send request to fw to get RSSI stats