include/acpi: add defines for CPPC versions 1-3

Change-Id: I6abbf98398057b9774fcfd9046ba933b5286e4cd
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46986
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

src/include/acpi/acpigen.h

@@ -231,6 +231,10 @@ struct dsm_uuid {
 	void *arg;
 };
 
+#define CPPC_VERSION_1	1
+#define CPPC_VERSION_2	2
+#define CPPC_VERSION_3	3
+
 /*version 1 has 15 fields, version 2 has 19, and version 3 has 21 */
 enum cppc_fields {
 	CPPC_HIGHEST_PERF, /* can be DWORD */