policer: use enum types

Make the policer action enum packed and use it in the policer code.
Use other policer enums where applicable.

Type: improvement
Signed-off-by: Brian Russell <brian@graphiant.com>
Change-Id: I32f9735942af8bca3160b9ef8a75f605d9aba5fa
diff --git a/src/vnet/policer/police_inlines.h b/src/vnet/policer/police_inlines.h
index f0b871a..f9378c7 100644
--- a/src/vnet/policer/police_inlines.h
+++ b/src/vnet/policer/police_inlines.h
@@ -62,7 +62,7 @@
 		     u64 time_in_policer_periods,
 		     policer_result_e packet_color)
 {
-  u8 act;
+  qos_action_type_en act;
   u32 len;
   u32 col;
   policer_read_response_type_st *pol;