[L] Change in coreboot[main]: acpi: Move EINJ code to vendorcode/ocp

[David Hendricks (Code Review)]

Attention is currently required from: Arthur Heymans, Jonathan Zhang, Lance Zhao, Martin L Roth, Rocky Phagura, Tim Wawrzynczak.

David Hendricks has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/77416?usp=email )

Change subject: acpi: Move EINJ code to vendorcode/ocp
......................................................................

Patch Set 3:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/77416/comment/d5b56a48_f4abd0f2 :
PS3, Line 7: acpi: Move EINJ code to vendorcode/ocp
> They *could* stay, but there's no reason to keep them if we're moving everything else out. […]

Breaking apart the header seems fine IMO, but I wouldn't consider things written from the ACPI spec to be akin to "random tables". How about moving `acpi_einj_smi_t` out, but keep the #defines and tables like `acpi_einj_action_table_t` in `include/acpi/`?