build: add build config for Versal NET

Add build configuration for AMD Versal NET platform to tftf.
The default configuration builds for Versal tests(TESTS=versal),
which includes standard tests along with AMD specific tests cases.

Signed-off-by: Akshay Belsare <akshay.belsare@amd.com>
Change-Id: I968dce614a508ae08e93c2b17a77e04c27b06b23
2 files changed