CLI:add l2 input/outut to "sh int features"

Change-Id: If608bbc7f4c8b0d5c3a237098a20279e407c82d3
Signed-off-by: Eyal Bari <ebari@cisco.com>
diff --git a/src/vnet/l2/l2_input.h b/src/vnet/l2/l2_input.h
index e6b3bc7..e8a6c77 100644
--- a/src/vnet/l2/l2_input.h
+++ b/src/vnet/l2/l2_input.h
@@ -148,6 +148,8 @@
 /** Return an array of strings containing graph node names of each feature */
 char **l2input_get_feat_names (void);
 
+/* arg0 - u32 feature_bitmap */
+u8 *format_l2_input_features (u8 * s, va_list * args);
 
 static_always_inline u8
 bd_feature_flood (l2_bridge_domain_t * bd_config)