perf stat: Add AGGR_UNSET mode

Adding AGGR_UNSET mode, so we could distinguish unset aggr_mode in
following patches.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Kan Liang <kan.liang@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1444992092-17897-30-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 1840572..abeb15a 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -479,6 +479,7 @@
 			csv_sep);
 		break;
 	case AGGR_GLOBAL:
+	case AGGR_UNSET:
 	default:
 		break;
 	}
@@ -799,6 +800,8 @@
 		case AGGR_GLOBAL:
 		default:
 			fprintf(output, "#           time             counts %*s events\n", unit_width, "unit");
+		case AGGR_UNSET:
+			break;
 		}
 	}
 
@@ -880,6 +883,7 @@
 		evlist__for_each(evsel_list, counter)
 			print_counter(counter, prefix);
 		break;
+	case AGGR_UNSET:
 	default:
 		break;
 	}
@@ -960,6 +964,7 @@
 	case AGGR_NONE:
 	case AGGR_GLOBAL:
 	case AGGR_THREAD:
+	case AGGR_UNSET:
 	default:
 		break;
 	}