arm-bsp/tc0: Add support for optee

This patch adds optee-os, optee-client, optee-test support in tc0 bsp.

Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
Change-Id: I65f795b7ec2b4def4778b286b2f744b06b177157
Signed-off-by: Jon Mason <jon.mason@arm.com>