tty: move the termios object into the tty

This will let us sort out a whole pile of tty related races. The
alternative would be to keep points and refcount the termios objects.
However
1. They are tiny anyway
2. Many devices don't use the stored copies
3. We can remove a pty special case

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/serial/keyspan.c

@@ -158,7 +158,7 @@ static void keyspan_set_termios(struct tty_struct *tty,
 
 	p_priv = usb_get_serial_port_data(port);
 	d_details = p_priv->device_details;
-	cflag = tty->termios->c_cflag;
+	cflag = tty->termios.c_cflag;
 	device_port = port->number - port->serial->minor;
 
 	/* Baud rate calculation takes baud rate as an integer
@@ -179,7 +179,7 @@ static void keyspan_set_termios(struct tty_struct *tty,
 	p_priv->flow_control = (cflag & CRTSCTS)? flow_cts: flow_none;
 
 	/* Mark/Space not supported */
-	tty->termios->c_cflag &= ~CMSPAR;
+	tty->termios.c_cflag &= ~CMSPAR;
 
 	keyspan_send_setup(port, 0);
 }
@@ -1089,7 +1089,7 @@ static int keyspan_open(struct tty_struct *tty, struct usb_serial_port *port)
 
 	device_port = port->number - port->serial->minor;
 	if (tty) {
-		cflag = tty->termios->c_cflag;
+		cflag = tty->termios.c_cflag;
 		/* Baud rate calculation takes baud rate as an integer
 		   so other rates can be generated if desired. */
 		baud_rate = tty_get_baud_rate(tty);