test-configs.yaml: Enable ftrace kselftests on Juno

Juno can boot the full kselftest kernel so let's use it to enable arm64
coverage for the ftrace selftests.

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

Author: broonie

config/core/test-configs.yaml

@@ -2931,6 +2931,7 @@ test_configs:
       - baseline-nfs
       - kselftest-cpufreq
       - kselftest-dt
+      - kselftest-ftrace
       - ltp-crypto
       # ltp-mm - runs system out of memory
       - smc