rcutorture: Make rcu_torture_write_types() print number of update types

This commit follows the list of update types with their count, resulting
in console output like this:

	rcu_torture_write_types: Testing conditional GPs.
	rcu_torture_write_types: Testing conditional expedited GPs.
	rcu_torture_write_types: Testing conditional full-state GPs.
	rcu_torture_write_types: Testing expedited GPs.
	rcu_torture_write_types: Testing asynchronous GPs.
	rcu_torture_write_types: Testing polling GPs.
	rcu_torture_write_types: Testing polling full-state GPs.
	rcu_torture_write_types: Testing polling expedited GPs.
	rcu_torture_write_types: Testing polling full-state expedited GPs.
	rcu_torture_write_types: Testing normal GPs.
	rcu_torture_write_types: Testing 10 update types

This commit adds the final line giving the count.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Neeraj Upadhyay <neeraj.upadhyay@kernel.org>

kernel/rcu/rcutorture.c

@@ -1324,6 +1324,7 @@ static void rcu_torture_write_types(void)
 	} else if (gp_sync && !cur_ops->sync) {
 		pr_alert("%s: gp_sync without primitives.\n", __func__);
 	}
+	pr_alert("%s: Testing %d update types.\n", __func__, nsynctypes);
 }
 
 /*