- fixed generic API (added neccessary EXPORT_SYMBOL, fixed hid.h to provide correct
  prototypes)
- extended hid_device with open/close/event function pointers to driver-specific
  functions
- added driver specific driver_data to hid_device
Signed-off-by: NJiri Kosina <jkosina@suse.cz>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>