fvp: cleanup

Remove `aemv8a-latest-revb` run config as this was used for defining
two different version of models. This is not needed anymore as we use
a single version of FVP model release.

Also `cortex-a78aex2` is not used so remove it.

Change-Id: Ifaf1f8c9fee7178b71ce29916ff4e8211f0f0337
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
8 files changed