check-compliance: Simplify undefined Kconfig symbol check

Use the new KCONFIG_STRICT Kconfiglib functionality, which makes the
library itself warn for references to undefined Kconfig symbols.

Also get rid of the chdir() hack. Kconfiglib now only looks up Kconfig
files relative to $srctree when it's set, so the hack is no longer
needed.

Remove list_undef_kconfig_refs.py. It's no longer needed.

Signed-off-by: Ulf Magnusson <Ulf.Magnusson@nordicsemi.no>
2 files changed