HID: hid-lenovo-go-s: Add RGB LED control interface

HID: hid-lenovo-go-s: Add RGB LED control interface

Adds an LED multicolor class device and attribute group for controlling
the RGB of the Left and right joystick rings. In addition to the standard
led_cdev attributes, additional attributes that allow for the control of
the effect (monocolor, breathe, rainbow, and chroma), speed of the
effect change, an enable toggle, and profile.

Reviewed-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Signed-off-by: Derek J. Clark <derekjohn.clark@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>