[PATCH 3/19] bhyve: use basl to load ACPI tables

[corvink]

Summary

Load the blobs compiled by iasl into a basl_table. The basl_table is a temporary buffer which copies the ACPI tables into guest memory for us. This allows us in the future to pass the blobs over the qemu fwcfg interface to the guest.

This is the third patch required to merge D36983

[jhb]

The log message here is perhaps not clear. I think what this commit is doing is saving the output of compiled tables in in a temporary buffer so it can either be uploaded to QEMU or written into guest memory (or both) vs always writing them directly into guest memory. The tables are still written into guest memory for now, but the intermediate buffer means they could be uploaded over the QEMU port in the future.