Merge changes from topic "gr/smccc-updates" into integration

* changes:
  refactor(smccc): refactor vendor-el3 build
  refactor(docs): added versioning to smccc services
  feat((smccc): add version FID for PMF
  refactor(smccc): move pmf to vendor el3 calls
  refactor(smccc): move debugfs to vendor el3 calls
  feat(smccc): add vendor-specific el3 service
  feat(smccc): add vendor specific el3 id