Input: aiptek - switch to using dev_groups for driver-specific attributes

The driver core now has the ability to handle the creation and removal
of device-specific sysfs files, let's use it instead of registering and
unregistering attributes by hand.

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20220903051119.1332808-3-dmitry.torokhov@gmail.com


Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>