conf: Move selftest config to dedicated inc file

conf: Move selftest config to dedicated inc file

Create a no-gplv3.inc file based upon knowledge currently encoded into one
of the selftests.

There is a risk that people try and take this idea too far, or have unrealistic
expectations. That said, it would be better to collect this knowledge together
in one location rather than handling it piecemeal.

Therefore move the configuration information from the test into a common
incude file.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>