staging: lustre: Remove yield() call

Remove yield() call. In this case it's use is considered broken, since
it is being assumed that yield() will let another process run that will
make the event true.

Signed-off-by: Thomas Avery <tavery321@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/obdclass/obd_config.c

@@ -455,7 +455,7 @@ static int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
 	spin_unlock(&obd->obd_dev_lock);
 
 	while (obd->obd_conn_inprogress > 0)
-		yield();
+		cond_resched();
 	smp_rmb();
 
 	if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {