USB: usblp: fix system suspend for some systems

this has been confirmed to fix suspend problems with usblp.

Signed-off-by: Oliver Neukum <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/class/usblp.c

···
 	down (&usblp->sem);
 	/* we take no more IO */
 	usblp->sleeping = 1;
-	/* we wait for anything printing */
-	wait_event (usblp->wait, usblp->wcomplete || !usblp->present);
 	usblp_unlink_urbs(usblp);
 	up (&usblp->sem);
 	mutex_unlock (&usblp_mutex);