UPSTREAM: HID: playstation: add DualSense touchpad support.

Implement support for DualSense touchpad as a separate input device.

Signed-off-by: Roderick Colenbrander <roderick.colenbrander@sony.com>
Reviewed-by: Barnabás Pőcze <pobrn@protonmail.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>

Bug: 167947264
Change-Id: I59b1d77b1d778366d05f5a929bbb205127914304
(cherry picked from commit f6bb05fcb2a10ff26ac5af1c29066d42019dc464)
Signed-off-by: Farid Chahla <farid.chahla@sony.com>