Updated P4_16 sample programs to reflect HW testbed

Change-Id: I9d76c9bc7632760cd9af1a3a431856291903eaf9
diff --git a/tools/test/p4src/p4-16/default.p4 b/tools/test/p4src/p4-16/default.p4
index ac4dd46..93683a5 100644
--- a/tools/test/p4src/p4-16/default.p4
+++ b/tools/test/p4src/p4-16/default.p4
@@ -58,10 +58,10 @@
             set_egress_port(standard_metadata);
             send_to_cpu(standard_metadata);
             do_ecmp();
-            drop(standard_metadata);
+            _drop(standard_metadata);
         }
         counters = table0_counter;
-        default_action = drop(standard_metadata);
+        default_action = _drop(standard_metadata);
     }
 
     action_selector(HashAlgorithm.crc16, 32w64, 32w16) ecmp_selector;