soc/amd/cezanne/cppc: reduce visibility of cpu_init_cppc_config

This function is only called from the same compilation unit, so turn it
into a static function.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I5c2deaa46f69c763df9612e39415b37c60d631be
Reviewed-on: https://review.coreboot.org/c/coreboot/+/66398
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-by: Fred Reitberger <reitbergerfred@gmail.com>
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>

src/soc/amd/cezanne/cppc.c

@@ -11,7 +11,7 @@
  * For now this function 'punts' on version 3 and just
  * populates the additional fields with 'unsupported'.
  */
-void cpu_init_cppc_config(struct cppc_config *config, u32 version)
+static void cpu_init_cppc_config(struct cppc_config *config, u32 version)
 {
 	config->version = version;
 

src/soc/amd/cezanne/include/soc/cppc.h

@@ -7,7 +7,6 @@
 #include <acpi/acpigen.h>
 
 struct cppc_config;
-void cpu_init_cppc_config(struct cppc_config *config, u32 version);
 void generate_cppc_entries(unsigned int core_id);
 
 #endif /* AMD_CEZANNE_CPPC_H */