[Tf-a-tests] Adding platform-specific tests

Hi all -- I was wondering what the intended procedure was for adding and running platform-specific TF-A tests? I see a plat/ directory in the tf-a-test/tftf/tests directory, so I assume I should use that, but I don't see a way to actually point to it normally. Has anyone tried this before? I did get it working in a hacky way[0], but I was hoping that there was an intended path. My use-case is to test some platform-specific hardware from TF-A. Thanks! Ross

[0] I added a `tests-platform.mk` pseudo test that looks in the plat directory for a platform.mk, just like for finding the platform's .c sources. Then it looks for the test pointed to by PLAT_TESTS.