Remove unused argument to vlib_feature_next

Change-Id: Ieb8b53977fc8484c19780941e232ee072b667de3
Signed-off-by: Damjan Marion <damarion@cisco.com>
diff --git a/src/vnet/geneve/decap.c b/src/vnet/geneve/decap.c
index b17c6da..f525fa3 100644
--- a/src/vnet/geneve/decap.c
+++ b/src/vnet/geneve/decap.c
@@ -943,10 +943,8 @@
 	    }
 
 	  /* Setup packet for next IP feature */
-	  vnet_feature_next (vnet_buffer (b0)->sw_if_index[VLIB_RX], &next0,
-			     b0);
-	  vnet_feature_next (vnet_buffer (b1)->sw_if_index[VLIB_RX], &next1,
-			     b1);
+	  vnet_feature_next (&next0, b0);
+	  vnet_feature_next (&next1, b1);
 
 	  if (is_ip4)
 	    {
@@ -1161,8 +1159,7 @@
 	    ip60 = vlib_buffer_get_current (b0);
 
 	  /* Setup packet for next IP feature */
-	  vnet_feature_next (vnet_buffer (b0)->sw_if_index[VLIB_RX], &next0,
-			     b0);
+	  vnet_feature_next (&next0, b0);
 
 	  if (is_ip4)
 	    /* Treat IP4 frag packets as "experimental" protocol for now