src/include/acpi: Move CPPC_PACKAGE_NAME macro definition

The patch moves the CPPC_PACKAGE_NAME macro definition from file
acpi/acpigen.c to include/acpi/acpigen.h file since the
CPPC_PACKAGE_NAME method will get called from cpu/intel/common
in a later patch.

TEST=Built the code for Brya

Signed-off-by: Sridhar Siricilla <sridhar.siricilla@intel.com>
Change-Id: Ic547445cdbe2b1a3efe44390bd127f577386e7fc
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59358
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

src/acpi/acpigen.c

@@ -10,8 +10,6 @@
 
 #define ACPIGEN_MAXLEN 0xfffff
 
-#define CPPC_PACKAGE_NAME "GCPC"
-
 #include <lib.h>
 #include <string.h>
 #include <acpi/acpigen.h>

src/include/acpi/acpigen.h

@@ -235,6 +235,8 @@ struct dsm_uuid {
 #define CPPC_VERSION_2	2
 #define CPPC_VERSION_3	3
 
+#define CPPC_PACKAGE_NAME "GCPC"
+
 /*version 1 has 15 fields, version 2 has 19, and version 3 has 21 */
 enum cppc_fields {
 	CPPC_HIGHEST_PERF, /* can be DWORD */