sb/amd/rs780: Get rid of device_t

Change-Id: Ica3b6f2d0b270930df77d528e70bd15972da8757
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/26477
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
6 files changed