soc/amd/picasso: Add config for PSP verstage signing token

This allows a platform to specify the location of the signing token
for the PSP verstage, and build it into the firmware image.

BUG=b:166108929
TEST=Build file into PSP firmware, verify that it's present and has
the correct ID.
BRANCH=Zork

Signed-off-by: Martin Roth <martinroth@chromium.org>
Change-Id: I182ad9b48a2776ccd29ead0f54cfe14c5bf45560
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44989
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Eric Peers <epeers@google.com>

0 files changed, 0 insertions, 0 deletions