soc/amd/stoney: clean up and update reset.c

- Move #defines to soc/northbridge.h, add other reset definitions to
soc/southbridge.h.
- Clean up file to use definitions instead of magic numbers.
- Add do_soft_reset()

BUG=b:69224851
TEST=Build gardenia; Build & boot Kahlee

Change-Id: I0cc4c04b53b7fec38d45e962ff1292d8c717269c
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/22439
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

0 files changed, 0 insertions, 0 deletions