rcu/nocb: Delete bypass_timer upon nocb_gp wakeup

A NOCB-gp wake p can safely delete the ->nocb_bypass_timer because
nocb_gp_wait() will recheck again the bypass state and rearm the bypass
timer if necessary. This commit therefore deletes this timer.

Reviewed-by: Boqun Feng <[e-mail]>
Signed-off-by: Frederic Weisbecker <[e-mail]>
Cc: Josh Triplett <[e-mail]>
Cc: Lai Jiangshan <[e-mail]>
Cc: Joel Fernandes <[e-mail]>
Cc: Neeraj Upadhyay <[e-mail]>
Signed-off-by: Paul E. McKenney <[e-mail]>

kernel/rcu/tree_plugin.h

···
 		del_timer(&rdp_gp->nocb_timer);
 	}
 
+	del_timer(&rdp_gp->nocb_bypass_timer);
+
 	if (force || READ_ONCE(rdp_gp->nocb_gp_sleep)) {
 		WRITE_ONCE(rdp_gp->nocb_gp_sleep, false);
 		needwake = true;