gso: add vxlan tunnel support

Type: feature

Change-Id: I85f6ec77187a4983c66c5e22fd39fbb2cef82902
Signed-off-by: Mohsin Kazmi <sykazmi@cisco.com>
diff --git a/src/vnet/gso/gso.c b/src/vnet/gso/gso.c
index cf90d22..c741b17 100644
--- a/src/vnet/gso/gso.c
+++ b/src/vnet/gso/gso.c
@@ -16,6 +16,7 @@
 #include <vlib/vlib.h>
 #include <vnet/vnet.h>
 #include <vppinfra/error.h>
+#include <vnet/ethernet/ethernet.h>
 #include <vnet/feature/feature.h>
 #include <vnet/l2/l2_in_out_feat_arc.h>
 #include <vnet/gso/gso.h>