Change in coreboot[master]: acpi,Makefile: Add preload_acpi_dsdt

[Raul Rangel (Code Review)]

Attention is currently required from: Lance Zhao, Patrick Georgi, Martin Roth, Tim Wawrzynczak, Julius Werner.
Raul Rangel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/59504 )

Change subject: acpi,Makefile: Add preload_acpi_dsdt
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Patch Set 2:

(1 comment)

Patchset:

PS2:
> buffering to RAM and writing it all out when the SPI reads are done should work, no?

Maybe I miss understood. Are you suggesting buffering the `rdev_eraseat` and `rdev_writeat` calls? So that when they get called, we store it in a buffer, and return? Then we perform them at a later point?

My concern there is that we need something to check if those writes were successful. We would also need to chain them somehow, so that a `writeat` is dependent on the `eraseat` call completing.