vcl: add DSCP support in VCL

Type: feature

Signed-off-by: Filip Tehlar <ftehlar@cisco.com>
Change-Id: I835675267c997b5dc92a0aaccdb58648bc786bb9
diff --git a/src/vcl/vcl_private.h b/src/vcl/vcl_private.h
index 285985e..66d4180 100644
--- a/src/vcl/vcl_private.h
+++ b/src/vcl/vcl_private.h
@@ -168,6 +168,7 @@
   u32 rcvbuf_size;		// VPP-TBD: Hack until support setsockopt(SO_RCVBUF)
 
   transport_endpt_ext_cfg_t *ext_config;
+  u8 dscp;
 
 #if VCL_ELOG
   elog_track_t elog_track;