staging: dgap: remove unneeded kfree() for ttys in tty_driver

In destruct_tty_driver() from put_tty_driver() will free the
ttys in tty_driver.

Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 file changed