feat(qemu): load and run RMM image

When RME is enabled, jump to the RMM image before BL33. When using
semihosting rather than FIP, the image called "rmm.bin" is loaded from
the runtime directory.

Change-Id: I15863410b1e505aa502276b339b22a2ddcb0b745
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
4 files changed