mb/intel/shadowmountain: Add ACPI entry for BT reset GPIO

Change-Id: Ia9e57f34eceaf1925dc5e3ffa6370ba0241447a4
Signed-off-by: Aamir Bohra <aamir.bohra@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51316
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: V Sowmya <v.sowmya@intel.com>

src/mainboard/intel/shadowmountain/variants/baseboard/devicetree.cb

@@ -230,6 +230,8 @@ chip soc/intel/alderlake
 					chip drivers/usb/acpi
 						register "desc" = ""Bluetooth""
 						register "type" = "UPC_TYPE_INTERNAL"
+						register "reset_gpio" =
+							"ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_A13)"
 						device usb 2.9 on end
 					end
 				end