docs: deprecate CryptoCell-712/713 drivers

We plan to deprecate the CryptoCell-712 and CryptoCell-713 drivers in
TF-A release v2.9 and eventually remove the code from the tree in
release 3.0.

The only upstream platforms which use these drivers today are the Arm
Ltd developpment platforms, such as Juno.

Write this information down into the "Release Processes" document.

Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
Change-Id: Ib064292733a271ecbff0dde315911017e2c4da7e
1 file changed