BugLink: http://bugs.launchpad.net/bugs/1657674

Dell Caracalla IoT gateways sport an RT5660 codec with HID 10EC3277.
This patch adds the machine driver required to support RT5660 codec on
Baytrail based systems.
Signed-off-by: Shrirang Bagul <shrirang.bagul@canonical.com>
Acked-by: Tim Gardner <tim.gardner@canonical.com>
Acked-by: Brad Figg <brad.figg@canonical.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>