sign_cr50_firmware.sh: allow signing MP images.

Allow MP images to be signed.  Also, the manifest file name changed.

BRANCH=none
BUG=b:74100307
TEST=manual

Change-Id: Ia6b4724ceea2b7a18a2caecea7142d1b6ebfaa13
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/1791816
Reviewed-by: LaMont Jones <lamontjones@chromium.org>
Commit-Queue: LaMont Jones <lamontjones@chromium.org>
Tested-by: LaMont Jones <lamontjones@chromium.org>
Auto-Submit: LaMont Jones <lamontjones@chromium.org>
1 file changed