kselftest/timers: Set default threadtest values to simplify execution scripts

In order to keep the kselftest Makefiles simpler, set the threadtest
default values to the ones used in standard run_tests

Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

tools/testing/selftests/timers/threadtest.c

@@ -126,11 +126,13 @@ void *independent_thread(void *arg)
 	return NULL;
 }
 
+#define DEFAULT_THREAD_COUNT 8
+#define DEFAULT_RUNTIME 30
 
 int main(int argc, char **argv)
 {
-	int thread_count = 1, i;
-	time_t start, now, runtime = 60;
+	int thread_count, i;
+	time_t start, now, runtime;
 	char buf[255];
 	pthread_t pth[MAX_THREADS];
 	int opt;
@@ -138,6 +140,8 @@ int main(int argc, char **argv)
 	int ret = 0;
 	void *(*thread)(void *) = shared_thread;
 
+	thread_count = DEFAULT_THREAD_COUNT;
+	runtime = DEFAULT_RUNTIME;
 
 	/* Process arguments */
 	while ((opt = getopt(argc, argv, "t:n:i")) != -1) {