feat(qemu-sbsa): add support for RME on SBSA machine

Add the necessary foundation to support Arm's RME extension on the SBSA
reference architecture.

Change-Id: If5a63ed0015cb33fcae367ff2cded811bbdc1e54
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
3 files changed