TF-A: Add linux test config for dual-chip RD-N1-Edge

Add TBB test configuration for dual-chip RD-N1-Edge to perform busybox
linux boot in tf-l3-boot-tests-css test group.

Change-Id: Ic1ff37fd107b3d4c3669844845927393301b8622
Signed-off-by: Vijayenthiran Subramaniam <vijayenthiran.subramaniam@arm.com>
1 file changed