bonding: add support for numa awareness

This patch enables bonding numa awareness on multi-socket
server working in active-backeup mode.
The VPP adds capability for automatically preferring slave
with local numa node in order to reduces the load on the
QPI-bus and improve system overall performance in multi-socket
use cases. Users doesn't need to add any extra operation as
usual.

Change-Id: Iec267375fc399a9a0c0a7dca649fadb994d36671
Signed-off-by: Zhiyong Yang <zhiyong.yang@intel.com>
diff --git a/src/vnet/interface.h b/src/vnet/interface.h
index c32311c..d87de60 100644
--- a/src/vnet/interface.h
+++ b/src/vnet/interface.h
@@ -565,6 +565,10 @@
   /* device input device_and_queue runtime index */
   uword *dq_runtime_index_by_queue;
 
+  /* numa node that hardware device connects to */
+  u8 numa_node;
+
+  u8 padding[3];
 } vnet_hw_interface_t;
 
 extern vnet_device_class_t vnet_local_interface_device_class;