Enable Arm FFA driver

JIRA: https://issues.redhat.com/browse/RHEL-16037
Depends: !3498 (merged)

This enables Arm's FFA (Firmware Framework for A-profile processors) driver which provides interfaces that standardize communication between various software images. This includes communication between images in the Secure world and Normal world. It also leverages the virtualization extension to isolate software images provided by an ecosystem of vendors from each other.

There are a number of optee patches (drivers/tee/optee) included even though optee is not enabled. Including them avoided a lot of conflicts in the FFA patches.

Tested using an Nvidia diagnostic tool. Details in the Jira ticket.

Signed-off-by: Mark Salter msalter@redhat.com