qcacmn: Synchronize VDEV_DELETE and VDEV_DOWN with peer delete response

Hold additional reference to BSS node during node allocation, and free
it in delete response. This ensures BSS Node Freed event is sent to MLME
only after receving peer delete response for BSS node.

Change-Id: I384eac54f437000a1c09eb53751ad8b8e26617ad
CRs-Fixed: 1112381

wmi_unified_priv.h

@@ -1217,6 +1217,11 @@ QDF_STATUS (*extract_pdev_utf_event)(wmi_unified_t wmi_hdl,
 
 uint16_t (*wmi_set_htc_tx_tag)(wmi_unified_t wmi_handle,
 				wmi_buf_t buf, uint32_t cmd_id);
+
+QDF_STATUS (*extract_peer_delete_response_event)(
+			wmi_unified_t wmi_handle,
+			void *evt_buf,
+			struct wmi_host_peer_delete_response_event *param);
 };
 
 struct target_abi_version {