tap_v2: convert ring size from network to host order

Change-Id: Ica1be5c75c83ac64c7063bfeff1f4d00702a00e1
Signed-off-by: Milan Lenco <milan.lenco@pantheon.tech>
diff --git a/src/vnet/devices/tap/tapv2_api.c b/src/vnet/devices/tap/tapv2_api.c
index 2d4d241..2b324d6 100644
--- a/src/vnet/devices/tap/tapv2_api.c
+++ b/src/vnet/devices/tap/tapv2_api.c
@@ -65,8 +65,8 @@
       clib_memcpy (ap->hw_addr, mp->mac_address, 6);
       ap->hw_addr_set = 1;
     }
-  ap->rx_ring_sz = mp->rx_ring_sz;
-  ap->tx_ring_sz = mp->tx_ring_sz;
+  ap->rx_ring_sz = ntohs (mp->rx_ring_sz);
+  ap->tx_ring_sz = ntohs (mp->tx_ring_sz);
   ap->sw_if_index = (u32) ~ 0;
 
   if (mp->host_namespace_set)