test-configs.yaml: Run ftrace selftests on Juno

For the purposes of getting the base kselftest ftrace template merged
enable the tests on Juno. There are other boards with much more capacity
which will more readily run this with the kselftest-slim PR merged.

Signed-off-by: Mark Brown <[email protected]>

Author: broonie

config/core/test-configs.yaml

@@ -2750,6 +2750,7 @@ test_configs:
       - baseline
       - baseline-nfs
       - kselftest-cpufreq
+      - kselftest-ftrace
       - ltp-crypto
       # ltp-mm - runs system out of memory
       - smc