USB: atm: fix up some remaining DEVICE_ATTR() usage

There's no need to have DEVICE_ATTR() in these crazy macros, so use the
proper DEVICE_ATTR_*() versions intead.

Cc: Matthieu CASTET <castet.matthieu@free.fr>
Cc: Stanislaw Gruszka <stf_xl@wp.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>