Merge changes from topic "secure_no_primary" into integration

* changes:
  spm: provide number of vCPUs and VM size for first SP
  spm: remove chosen node from SPMC manifests
  spm: move OP-TEE SP manifest DTS to FVP platform
  spm: update OP-TEE SP manifest with device-regions node
  spm: remove device-memory node from SPMC manifests