dptf: Add support for one more temperature sensor

Some boards may use more than 4 temperature sensors for DPTF thermal
control, so this patch adds support for one more temperature sensor.

BUG=b:207585491

Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Change-Id: Ibf9666bade23b9bb4f740c6c4df6ecf5227cfb45
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59632
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Scott Chao <scott_chao@wistron.corp-partner.google.com>
Reviewed-by: Sumeet R Pawnikar <sumeet.r.pawnikar@intel.com>

src/acpi/acpigen_dptf.c

@@ -70,6 +70,8 @@ static const char *namestring_of(enum dptf_participant participant)
 		return "TSR2";
 	case DPTF_TEMP_SENSOR_3:
 		return "TSR3";
+	case DPTF_TEMP_SENSOR_4:
+		return "TSR4";
 	case DPTF_TPCH:
 		return "TPCH";
 	default: