HID: hid-google-stadiaff: add support for Stadia force feedback

Add a hid-google-stadiaff module to support rumble based force feedback
on the Google Stadia controller. This works using the HID output
endpoint exposed on both the USB and BLE interface.

Signed-off-by: Fabio Baltieri <fabiobaltieri@chromium.org>
Reviewed-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>