qcacld-3.0: Add vendor cmd to support antenna diversity

qcacld-2.0 to qcacld-3.0 propagation

Add qca_wlan_vendor_config attr to config antenna diversity.
Add vendor subcmd QCA_NL80211_VENDOR_SUBCMD_GET_CHAIN_RSSI
to get chain rssi value.

Change-Id: I75c4c8016b15772b0c52be91e446f69580475496
CRs-fixed: 1071075
diff --git a/core/wma/inc/wma_internal.h b/core/wma/inc/wma_internal.h
index aeb64e8..91eebb8 100644
--- a/core/wma/inc/wma_internal.h
+++ b/core/wma/inc/wma_internal.h
@@ -1327,4 +1327,19 @@
  */
 int wma_wlan_bt_activity_evt_handler(void *handle, uint8_t *event,
 				     uint32_t len);
+
+/**
+ * wma_peer_ant_info_evt_handler - event handler to handle antenna info
+ * @handle: the wma handle
+ * @event: buffer with event
+ * @len: buffer length
+ *
+ * This function receives antenna info from firmware and passes the event
+ * to upper layer
+ *
+ * Return: 0 on success
+ */
+int wma_peer_ant_info_evt_handler(void *handle, u_int8_t *event,
+	u_int32_t len);
+
 #endif