rcu: tree_plugin.h: use true/false in assignment to bool

bool variables in this code are using true/false for assignments
fix this up for consistency/readability.

Signed-off-by: Nicholas Mc Guire <der.herr@hofr.at>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

kernel/rcu/tree_plugin.h

diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index db0a034..6d8f7f8 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -1709,7 +1709,7 @@ __setup("rcu_nocbs=", rcu_nocb_setup);
 
 static int __init parse_rcu_nocb_poll(char *arg)
 {
-	rcu_nocb_poll = 1;
+	rcu_nocb_poll = true;
 	return 0;
 }
 early_param("rcu_nocb_poll", parse_rcu_nocb_poll);