mfd: cros_ec: Instantiate ChromeOS EC character device

The ChromeOS EC character device is an user-space interface to
allow applications to access the Embedded Controller.

Add a cell for this device so it's spawned from the mfd driver.
Signed-off-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Acked-by: NLee Jones <lee.jones@linaro.org>
Tested-by: NGwendal Grignou <gwendal@chromium.org>
Reviewed-by: NGwendal Grignou <gwendal@chromium.org>
Signed-off-by: NOlof Johansson <olof@lixom.net>

drivers/mfd/cros_ec.c

@@ -118,6 +118,10 @@ static const struct mfd_cell cros_devs[] = {
 		.id = 2,
 		.of_compatible = "google,cros-ec-i2c-tunnel",
 	},
+	{
+		.name = "cros-ec-ctl",
+		.id = 3,
+	},
 };
 
 int cros_ec_register(struct cros_ec_device *ec_dev)