signer: create devkeys with and without pkc

Signing test of firmware for non-t210 targets fails when PKC
keys are present so separate devkeys into two keysets where only
one has the PKC key.

BUG=chrome-os-partner:44227
TEST=sign_official_build.sh nv_lp0_firmware tegra_lp0_resume.fw tests/devkeys-pkc tegra_lp0_resume.fw.signed versions.default
BRANCH=signer

Change-Id: Ie0670638d30d17692f1113b5a9f0309ea610d72a
Signed-off-by: David Riley <davidriley@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/298091
Reviewed-by: Mike Frysinger <vapier@chromium.org>
29 files changed