qemu: Add support for Trusted Board Boot

This patch adds support for TBB to qemu. An RSA ROT keypair is generated at
build time and is included into BL1/BL2. The key and content certificates
are read over semihosting.

Fixes ARM-software/tf-issues#526

Signed-off-by: Michalis Pappas <mpappas@fastmail.fm>
4 files changed