bier: migrate old MULTIARCH macros to VLIB_NODE_FN

Change-Id: I561591c7d31ec66dfa0a1d7ef66bcf1d0c70f07c
Signed-off-by: Filip Tehlar <ftehlar@cisco.com>
diff --git a/src/vnet/bier/bier_disp_lookup_node.c b/src/vnet/bier/bier_disp_lookup_node.c
index 1e1ea99..255f045 100644
--- a/src/vnet/bier/bier_disp_lookup_node.c
+++ b/src/vnet/bier/bier_disp_lookup_node.c
@@ -132,8 +132,7 @@
     return (s);
 }
 
-static uword
-bier_disp_lookup (vlib_main_t * vm,
+VLIB_NODE_FN (bier_disp_lookup_node) (vlib_main_t * vm,
                   vlib_node_runtime_t * node,
                   vlib_frame_t * frame)
 {
@@ -141,7 +140,6 @@
 }
 
 VLIB_REGISTER_NODE (bier_disp_lookup_node) = {
-    .function = bier_disp_lookup,
     .name = "bier-disp-lookup",
     .vector_size = sizeof (u32),
 
@@ -152,4 +150,3 @@
         [BIER_DISP_LOOKUP_NEXT_DISPATCH] = "bier-disp-dispatch",
     }
 };
-VLIB_NODE_FUNCTION_MULTIARCH (bier_disp_lookup_node, bier_disp_lookup)