Add utility files for dual RD-N1-Edge

In preparation to add dual-chip RD-N1-Edge platform to SCP and TF-A CI,
add config files for dual RD-N1-Edge FVP.

Change-Id: I01310c15adbd3683936db2f5c28f1581ea26d843
Signed-off-by: Vijayenthiran Subramaniam <vijayenthiran.subramaniam@arm.com>
3 files changed