CHROMEOS: HID: MT-B driver for Logitech wireless touchpads

CHROMEOS: HID: MT-B driver for Logitech wireless touchpads

This is part of the next iteration of Nestor Lopez Casado's
introduction of HID++ support to the kernel from his patch "[PATCH
1/1] HID: Add full MT support for Logitech Wireless Touchpad"

This driver provides an MT-B driver for Logitech wireless
touchpads. It currently supports two models:

- Logitech Wireless Touchpad
- Logitech Wireless Rechargeable Touchpad T650

Documentation is provided at
https://drive.google.com/a/logitech.com/?tab=mo#folders/0BxbRzx7vEV7eWmgwazJ3NUFfQ28

BUG=chromium-os:39354
TEST=manually tested on Link

Change-Id: I0085dfb053f7b9c0931c39c0d28ba1608216a2a5
Signed-off-by: Andrew de los Reyes <adlr@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/46010
Reviewed-by: Yufeng Shen <miletus@chromium.org>