tty:serial_core: Spelling mistake

fix spelling mistake "overriden" -> "overridden"

This fix resolves warning reported by checkpatch tool.

Signed-off-by: Hariprasad Kelam <hariprasad.kelam@gmail.com>
Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/serial_core.c

@@ -1514,7 +1514,7 @@ static void uart_set_termios(struct tty_struct *tty,
 	}
 
 	uart_change_speed(tty, state, old_termios);
-	/* reload cflag from termios; port driver may have overriden flags */
+	/* reload cflag from termios; port driver may have overridden flags */
 	cflag = tty->termios.c_cflag;
 
 	/* Handle transition to B0 status */