classify: remove includes from classifier header file

Type: refactor

Change-Id: I6f0af1c3078edce1c1b29a8b99c4a232d7084d33
Signed-off-by: Damjan Marion <damarion@cisco.com>
diff --git a/src/vnet/l2/l2_input.h b/src/vnet/l2/l2_input.h
index 677186b..0e1e98f 100644
--- a/src/vnet/l2/l2_input.h
+++ b/src/vnet/l2/l2_input.h
@@ -21,6 +21,7 @@
 #include <vlib/vlib.h>
 #include <vnet/vnet.h>
 #include <vnet/l2/l2_bd.h>
+#include <vnet/ethernet/ethernet.h>
 #include <vnet/ethernet/packet.h>
 #include <vnet/ip/ip.h>