amd/picasso/psp_verstage: Add modexp svc wrapper

The PSP bootloader version 0.08.0B.7B added support for the Mod Exp
svc call.

BUG=b:169157796
BRANCH=zork
TEST=build verstage for zork

Signed-off-by: Kangheui Won <khwon@chromium.org>
Change-Id: Ifdbf20544b21b7fa90a49c5497ff4a5da61bebb1
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45985
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Eric Peers <epeers@google.com>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>

0 files changed, 0 insertions, 0 deletions