platform/chrome: cros_typec_switch: Set EC retimer

Invoke ChromeOS EC host commands to set EC-controlled retimer switches
to the state the Type-C framework instructs.

Signed-off-by: Prashant Malani <pmalani@chromium.org>
Reviewed-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://lore.kernel.org/r/20220816214857.2088914-4-pmalani@chromium.org