CSME should be enabled when S0ix is used for power savings during
suspend. TGL-U is just one case where we default as our TGL-U models
do not support S3. Other models may use S0ix as well, such as darp8 and
darp9 due to new batches just not working with S3 anymore [1].
[1]: https://github.com/system76/firmware-open/issues/507
Signed-off-by: Tim Crawford <tcrawford@system76.com>
I had forgotten that CSME reporting an error was normal when disabled.
Document what is should report when enabled/disabled.
Signed-off-by: Tim Crawford <tcrawford@system76.com>
