soc/amd/stoneyridge: add a romstage hook for mainboards

There wasn't previously a way for Stoney platforms to run mainboard
specific code in romstage.  This adds an early call for configuration
and passes along whether the system is currently resuming from S3.

BUG=b:77921345
TEST=Build, verify that weak function implementation gets called.

Change-Id: Id94855e1084814ec37956e603cd093d70f01a559
Signed-off-by: Martin Roth <martinroth@chromium.org>
Reviewed-on: https://review.coreboot.org/25635
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
2 files changed