ec/google/chromeec: Add retimer handle to Type C conn

Some platforms have retimers which can be configured via the EC. Add a
handle to these retimer devices to the Type C connector device, using
devicetree references.

BUG=b:208883648
TEST=Verify disassembled SSDT on brya.
BRANCH=None

Signed-off-by: Prashant Malani <pmalani@chromium.org>
Change-Id: Ic0480b08c6d6a7562cca57192e49b8ea2a33b51e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63793
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

src/include/acpi/acpigen_usb.h

@@ -41,6 +41,8 @@ enum usb_typec_data_role {
  *	host or device, for the USB port
  * @mode_switch: Reference to the ACPI device that controls routing of data lines to
  *	various endpoints (xHCI, DP, etc.) on the SoC.
+ * @retimer_switch: Reference to the ACPI device that controls the configuration
+ * of the retimer in the Type C signal chain.
  * @pld: Reference to PLD information.
  */
 struct typec_connector_class_config {
@@ -53,6 +55,7 @@ struct typec_connector_class_config {
 	const struct device *orientation_switch;
 	const struct device *usb_role_switch;
 	const struct device *mode_switch;
+	const struct device *retimer_switch;
 	const struct acpi_pld *pld;
 };