soc/amd/common/psp/psp_smi_flash: factor out generation-specific code

Factor out the code to access the request buffer into PSP generation
specific file. This is a preparation for adding PSP SMI flash access
support for the PSP generation 1 which has a slightly different request
buffer layout.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I8e18f7ea53592d9fd413ad56e8d137cfc13ad5d4
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84062
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>

0 files changed, 0 insertions, 0 deletions