perf evsel: No need to always ask for PERF_FORMAT_TOTAL_TIME_{ENABLED,RUNNING}

This is needed, so far, just in 'perf stat', to scale counters, so don't
unconditionally ask for them in the perf_evsel__config() method.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-ujpujgscq2f2oodxuso5nobc@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/tests/attr/base-record

@@ -7,7 +7,7 @@ size=96
 config=0
 sample_period=4000
 sample_type=263
-read_format=3
+read_format=0
 disabled=1
 inherit=1
 pinned=0

tools/perf/tests/attr/test-record-group

@@ -6,14 +6,14 @@ args    = --group -e cycles,instructions kill >/dev/null 2>&1
 fd=1
 group_fd=-1
 sample_type=327
-read_format=7
+read_format=4
 
 [event-2:base-record]
 fd=2
 group_fd=1
 config=1
 sample_type=327
-read_format=7
+read_format=4
 mmap=0
 comm=0
 enable_on_exec=0

tools/perf/tests/attr/test-record-group1

@@ -6,7 +6,7 @@ args    = -e '{cycles,instructions}' kill >/tmp/krava 2>&1
 fd=1
 group_fd=-1
 sample_type=327
-read_format=7
+read_format=4
 
 [event-2:base-record]
 fd=2
@@ -14,7 +14,7 @@ group_fd=1
 type=0
 config=1
 sample_type=327
-read_format=7
+read_format=4
 mmap=0
 comm=0
 enable_on_exec=0

tools/perf/util/evsel.c

@@ -465,8 +465,6 @@ void perf_evsel__config(struct perf_evsel *evsel,
 
 	attr->sample_id_all = opts->sample_id_all_missing ? 0 : 1;
 	attr->inherit	    = !opts->no_inherit;
-	attr->read_format   = PERF_FORMAT_TOTAL_TIME_ENABLED |
-			      PERF_FORMAT_TOTAL_TIME_RUNNING;
 
 	perf_evsel__set_sample_bit(evsel, IP);
 	perf_evsel__set_sample_bit(evsel, TID);