mb/google/volteer: Enable USB4 retimer driver

Enable the USB4 retimer driver with GPP_H10 as the power control.

Change-Id: I166bc477f94c159bb411620a6bf77b5d1f194fb2
Signed-off-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44919
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>

src/mainboard/google/volteer/Kconfig

@@ -8,6 +8,7 @@ config BOARD_GOOGLE_BASEBOARD_VOLTEER
 	select DRIVERS_I2C_SX9310
 	select DRIVERS_INTEL_DPTF
 	select DRIVERS_INTEL_PMC
+	select DRIVERS_INTEL_USB4_RETIMER
 	select DRIVERS_I2C_MAX98373
 	select DRIVERS_INTEL_SOUNDWIRE
 	select DRIVERS_SPI_ACPI

src/mainboard/google/volteer/variants/baseboard/devicetree.cb

@@ -426,6 +426,10 @@ chip soc/intel/tigerlake
 		device ref tbt_dma0 on
 			probe DB_USB USB4_GEN2
 			probe DB_USB USB4_GEN3
+			chip drivers/intel/usb4/retimer
+				register "power_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_H10)"
+				device generic 0 on end
+			end
 		end
 		device ref gna on end
 		device ref north_xhci on end