Hi Greg,
Please include commit 36904703aeee ("ACPI / bus: Parse tables as term_list for Dell XPS 9570 and Precision M5530") for v4.14+.
This can be backported to older versions, but this system won't function on v4.4 or v4.9. It requires new drivers that don't exist in v4.4 or v4.9.
Thanks!
Kai-Heng