HID: hid-lg4ff: Constify members of lg4ff_device_entry

Constify those members of lg4ff_device_entry struct whose value is not
supposed to change.

Signed-off-by: Michal Malý <madcatxster@devoid-pointer.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
1 file changed