uefi: add --keyform engine for pkcs11

When signing with pkcs11, add --keyform engine to the openssl call.

BUG=b:372702794
TEST=./do_a_signing.py -d gs://chromeos-releases/canary-channel/reven/
  16161.0.0/ChromeOS-recovery-R134-16161.0.0-reven.tar.xz -k
  DevPreMPKeys -t RECOVERY --debug
BRANCH=None

Signed-off-by: Benjamin Shai <[email protected]>
Change-Id: Iba3e77bfe824668e207322cd7d9ff27ff37e4d1e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/6580941
Reviewed-by: Madeleine Hardt <[email protected]>
Reviewed-by: Nicholas Bishop <[email protected]>
1 file changed