It's helpful to see the sibling field, even when it's NULL, when debugging the static.c output from a devictree.cb file. Ensure the NULL fields are emitted for fullness. Change-Id: Ib6d5b8164769a6512e762d5a525c7df1f429c866 Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: https://review.coreboot.org/c/coreboot/+/39862 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Furquan Shaikh <furquan@google.com>