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/dhcp/dhcp6_client_common_dp.c b/src/vnet/dhcp/dhcp6_client_common_dp.c
index d9e1fc7..7ca3b61 100644
--- a/src/vnet/dhcp/dhcp6_client_common_dp.c
+++ b/src/vnet/dhcp/dhcp6_client_common_dp.c
@@ -13,6 +13,7 @@
  * limitations under the License.
  */
 
+#include <vnet/ethernet/ethernet.h>
 #include <vnet/dhcp/dhcp6_client_common_dp.h>
 #include <vnet/dhcp/dhcp6_ia_na_client_dp.h>
 #include <vnet/dhcp/dhcp6_pd_client_dp.h>