perf test: Make the rdpmc test honour 'verbose' mode

It was unconditionally printing debug stuff when in non -v mode we
should just print the name and result of the test.

Now:

[root@sandy ~]# perf test rdpmc
 6: x86 rdpmc test: Ok
[root@sandy ~]# perf test -v rdpmc
 6: x86 rdpmc test:
--- start ---
             0:           6030
             1:          60030
             2:         600050
             3:        6000056
             4:       60000070
             5:      600000266
   ---- end ----
x86 rdpmc test: Ok
[root@sandy ~]#

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.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-0tjedaozsy9oarq30nvzg74b@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-test.c

@@ -1549,8 +1549,6 @@ static int __test__rdpmc(void)
 	sa.sa_sigaction = segfault_handler;
 	sigaction(SIGSEGV, &sa, NULL);
 
-	fprintf(stderr, "\n\n");
-
 	fd = sys_perf_event_open(&attr, 0, -1, -1, 0);
 	if (fd < 0) {
 		die("Error: sys_perf_event_open() syscall returned "
@@ -1575,7 +1573,7 @@ static int __test__rdpmc(void)
 		loops *= 10;
 
 		delta = now - stamp;
-		fprintf(stderr, "%14d: %14Lu\n", n, (long long)delta);
+		pr_debug("%14d: %14Lu\n", n, (long long)delta);
 
 		delta_sum += delta;
 	}
@@ -1583,7 +1581,7 @@ static int __test__rdpmc(void)
 	munmap(addr, page_size);
 	close(fd);
 
-	fprintf(stderr, "   ");
+	pr_debug("   ");
 
 	if (!delta_sum)
 		return -1;