HID: support for Gameron dual psx adaptor

This patch provides support for the Gameron dual psx adaptor.  The
modification  is to add the quirk HID_QUIRK_MULTI_INPUT for this
specific USB device.

Signed-off-by: Julien Eyries <jeyries@yahoo.fr>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>