Add missing call to uart_update_timeout()

This patch fixes a problem reported here:
http://article.gmane.org/gmane.linux.ports.arm.kernel/155242/match=auart

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/mxs-auart.c

@@ -369,6 +369,8 @@ static void mxs_auart_settermios(struct uart_port *u,
 
 	writel(ctrl, u->membase + AUART_LINECTRL);
 	writel(ctrl2, u->membase + AUART_CTRL2);
+
+	uart_update_timeout(u, termios->c_cflag, baud);
 }
 
 static irqreturn_t mxs_auart_irq_handle(int irq, void *context)