Implements a new USB-HID for Force Feedback based on the normal
Logitech Force Feedback code and FF-Memless.

Currently only supports the FF_CONSTANT effect although the joystick
appears to support additional non-standard ones.
Signed-off-by: NGary Stein <LordCnidarian@gmail.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>