sign_official_build: Sign hps_firmware

BUG=b:204378599
TEST=None
BRANCH=None

Signed-off-by: Evan Benn <evanbenn@chromium.org>

Cq-Depend: chrome-internal:4473134
Change-Id: I2316ec9e75e854352350e90055e717a258c43f6e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/3388968
Tested-by: Evan Benn <evanbenn@chromium.org>
Auto-Submit: Evan Benn <evanbenn@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Evan Benn <evanbenn@chromium.org>
1 file changed