Merge changes from topic "handoff_tpm_event_log" into integration

* changes:
  feat(qemu): hand off TPM event log via TL
  feat(handoff): common API for TPM event log handoff
  feat(handoff): transfer entry ID for TPM event log
  fix(qemu): fix register convention in BL31 for qemu
  fix(handoff): fix register convention in opteed