feat(hikey960): add SP manifest for SPMC_AT_EL3

The purpose of this patch is to show silicon partners how to upgrade
existing TF-A port to include a manifest that is required with FF-A.

The manifest values are consumed by TF-A SPMC_AT_EL3 and by the TEE.

Change-Id: Ied81187d6b1cfb72ad2e9020dfc19ad73d80186f
Signed-off-by: Cedric Chan <cedric.chan@trustonic.com>
Signed-off-by: vallau01 <valentin.laurent@trustonic.com>
Signed-off-by: Lukas Hanel <lukas.hanel@trustonic.com>