misc: pti, use tty_port_register_device

So now we have enough of tty_ports, so we can signal the TTY layer to
use them by tty_port_register_device.

The upside is that we look like we can introduce tty_port_easy_open
and put it directly as tty_operations->open to drivers doing nothing
in open and using tty_port_register_device. Because the easy open can
obtain a tty_port rather easily from a tty now. Heh, what a nice
by-product.
Signed-off-by: NJiri Slaby <jslaby@suse.cz>
Cc: J Freyensee <james_p_freyensee@linux.intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/pti.c

@@ -427,7 +427,7 @@ static int pti_tty_driver_open(struct tty_struct *tty, struct file *filp)
 	 * also removes a locking requirement for the actual write
 	 * procedure.
 	 */
-	return tty_port_open(&drv_data->port[tty->index], tty, filp);
+	return tty_port_open(tty->port, tty, filp);
 }
 
 /**
@@ -443,7 +443,7 @@ static int pti_tty_driver_open(struct tty_struct *tty, struct file *filp)
  */
 static void pti_tty_driver_close(struct tty_struct *tty, struct file *filp)
 {
-	tty_port_close(&drv_data->port[tty->index], tty, filp);
+	tty_port_close(tty->port, tty, filp);
 }
 
 /**
@@ -856,7 +856,7 @@ static int __devinit pti_pci_probe(struct pci_dev *pdev,
 		tty_port_init(port);
 		port->ops = &tty_port_ops;
 
-		tty_register_device(pti_tty_driver, a, &pdev->dev);
+		tty_port_register_device(port, pti_tty_driver, a, &pdev->dev);
 	}
 
 	register_console(&pti_console);