soc/amd/phoenix/psp_verstage: Fix the hash file names
Fix the hash file names to be used to verify signed PSP binaries when
booting with VBOOT FW Slot B.
BUG=None
TEST=Build and boot to OS in Myst with PSP Verstage enabled using both
VBOOT slots A and B.
Change-Id: I89f02922bc901d8ac71d48bf5128fe6ecead43a0
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/78236
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>