bios bits acpica upgrade

[Ani Sinha]

Hi Josh :

I have gone ahead and upgraded the acpica. Changes need to be reviewed
and bits need to be tested more. However, here are the changes:

In the acpica submodule:
https://github.com/biosbits/acpica/pull/1

in the main top level bits repo:
https://github.com/ani-sinha/bits/compare/master...ani-sinha:acpica-unix2-20220331

Hope to hear back from you soon,
Ani