completelly deprecate os_get_cpu_number, replace new occurences

Change-Id: I82c663bc0866c6c68ba354104b0bb059387f4b9d
Signed-off-by: Damjan Marion <damarion@cisco.com>
diff --git a/src/vnet/lisp-gpe/lisp_gpe_adjacency.c b/src/vnet/lisp-gpe/lisp_gpe_adjacency.c
index d5f3a28..7db1c9b 100644
--- a/src/vnet/lisp-gpe/lisp_gpe_adjacency.c
+++ b/src/vnet/lisp-gpe/lisp_gpe_adjacency.c
@@ -302,7 +302,7 @@
 
   /* compute payload length starting after GPE */
   u32 bytes = b->current_length - (lisp_data - b->data - b->current_data);
-  vlib_increment_combined_counter (&lgm->counters, os_get_cpu_number (),
+  vlib_increment_combined_counter (&lgm->counters, vlib_get_thread_index (),
 				   p[0], 1, bytes);
 }