Remove c-11 memcpy checks from perf-critical code

Change-Id: Id4f37f5d4a03160572954a416efa1ef9b3d79ad1
Signed-off-by: Dave Barach <dave@barachs.net>
diff --git a/src/vppinfra/heap.h b/src/vppinfra/heap.h
index b6e9f02..22fc335 100644
--- a/src/vppinfra/heap.h
+++ b/src/vppinfra/heap.h
@@ -204,7 +204,7 @@
 		 HEAP_DATA_ALIGN);
   h_new = heap_header (v_new);
   heap_dup_header (h_old, h_new);
-  clib_memcpy (v_new, v_old, v_bytes);
+  clib_memcpy_fast (v_new, v_old, v_bytes);
   return v_new;
 }