soc/amd/stoneyridge: factor out P-state utils to link in all stages

tsc_freq.c gets built into all stages, but the tsc_freq_mhz function it
implements calls the get_pstate_0_reg function which was only built into
ramstage. Since tsc_freq_mhz was only called in ramstage, commit
2323acab6a7a ("soc/amd/stoneyridge: implement and use get_pstate_0_reg")
didn't cause the build to fail, but better factor out the P-state-
related utility functions into a separate compilation unit and include
it in all stages that also include tsc_freq.c.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Id3a3ee218f495be5e60a888944487704e7e8a1a1
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74145
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Reviewed-by: Martin Roth <martin.roth@amd.corp-partner.google.com>

0 files changed, 0 insertions, 0 deletions