Populate FVP YAML files for foundationv8 models

FVP YAML file generation is a two step process: 1. yaml template
creation and 2. fvp values replacement on template created by 1. This
patch only relates to 2 and specifically for 'foundationv8' models.

Signed-off-by: Leonardo Sandoval <leonardo.sandoval@linaro.org>
Change-Id: Icede4a271fdb1a446c459e933c296ef669f81f61
7 files changed