interface: rx queue infra rework, part one

Type: improvement
Change-Id: I4008cadfd5141f921afbdc09a3ebcd1dcf88eb29
Signed-off-by: Damjan Marion <damarion@cisco.com>
diff --git a/src/vnet/devices/virtio/vhost_user.h b/src/vnet/devices/virtio/vhost_user.h
index 604e557..06c78bc 100644
--- a/src/vnet/devices/virtio/vhost_user.h
+++ b/src/vnet/devices/virtio/vhost_user.h
@@ -227,9 +227,9 @@
 
   u16 used_wrap_counter;
   u16 avail_wrap_counter;
-
   u16 last_kick;
   u8 first_kick;
+  u32 queue_index;
 } vhost_user_vring_t;
 
 #define VHOST_USER_EVENT_START_TIMER 1