* S3 (Suspend to RAM), S4 (Suspend to Disk).
Features that are optional:
- * ACPI global NVS support. We may need it to simplify ASL code logic if
- utilizing NVS variables. Most likely we will need this sooner or later.
* Dynamic AML bytecodes insertion at run-time. We may need this to support
SSDT table generation and DSDT fix up.
* SMI support. Since U-Boot is a modern bootloader, we don't want to bring