soc/amd/stoneyridge: factor out AGESA-wrapper related FCH functions

Split the code that gets called from the AGESA wrapper from the rest of
the FCH/southbridge code that directly interacts with the hardware.
Since the remaining parts of southbridge.c aren't used in romstage,
drop it from the list of build targets for romstage.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I6197add0e1396a82545735653110e1e17bf9c303
Reviewed-on: https://review.coreboot.org/c/coreboot/+/60141
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

0 files changed, 0 insertions, 0 deletions