HID: roccat: enable Koneplus device reset

Device can be reset to factory state by sending a command via info sysfs attr.
Added binary attribute info for this purpose, which obsoletes firmware_version
attribute.

Signed-off-by: Stefan Achatz <erazor_de@users.sourceforge.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>