[TF-A] Deprecation of Arm CryptoCell-712/713 drivers

Hello,

This is a courtesy notification that we plan to deprecate Arm CryptoCell-712 and CryptoCell-713 drivers in TF-A release v2.9, with the goal to remove their source code from the tree in the following TF-A release after that.

This won't affect any upstream platforms beyond Arm Ltd platforms (under plat/arm/ folder).

If you have any concerns with this, please raise them by Monday, April 24th.

Best regards, Sandrine