[CI] am57xx-evm: linux-4.9.y 3622426cc93a Failure

Build URL: https://ci.linaro.org/job/openembedded-lkft-linux-stable-rc-4.9/DISTRO=rpb,M... Full log: https://ci.linaro.org/job/openembedded-lkft-linux-stable-rc-4.9/DISTRO=rpb,M... Parsed warnings/errors: https://ci.linaro.org/job/openembedded-lkft-linux-stable-rc-4.9/DISTRO=rpb,M... Git branch: linux-4.9.y Git URL: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git Git commit: 3622426cc93ab5bc75fa9cf2e897441dff894c34

Errors: ERROR: ExpansionError during parsing /srv/oe/build/conf/../../layers/meta-rpb/recipes-overlayed/kselftests/kselftests-next_git.bb