soc/amd/common/block/acpi/cppc: drop outdated comment

Since commit d5ab24cd48 ("soc/amd/common/acpi/cppc: add nominal and
minimum frequencies") the fields that got added in CPPC version 3 get
populated, so remove the now outdated comment about the fields added in
version 3 always being set to CPPC_UNSUPPORTED.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I4c975b42fc4f67329170801b871d6bbdf9637d04
Reviewed-on: https://review.coreboot.org/c/coreboot/+/72046
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>

src/soc/amd/common/block/acpi/cppc.c

@@ -7,11 +7,6 @@
 #include <soc/msr.h>
 #include <types.h>
 
-/*
- * version 2 is expected to be the typical use case.
- * For now this function 'punts' on version 3 and just
- * populates the additional fields with 'unsupported'.
- */
 static void cpu_init_cppc_config(struct cppc_config *config, u32 version)
 {
 	uint32_t lowest_freq_mhz;