[S] Change in coreboot[main]: acpi/acpi_gic: Add GIC ITS subtable

[Nico Huber (Code Review)]

Attention is currently required from: Angel Pons, Arthur Heymans, Cliff Huang, Lance Zhao, Lean Sheng Tan, Maximilian Brune, Naresh Solanki, Patrick Rudolph, Paul Menzel, Tim Wawrzynczak.

Nico Huber has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/78115?usp=email )

Change subject: acpi/acpi_gic: Add GIC ITS subtable
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Patch Set 5:

(1 comment)

File src/acpi/acpi_gic.c:

https://review.coreboot.org/c/coreboot/+/78115/comment/68c81f92_248933e5 :
PS5, Line 92: &its_base
It needs a `uintptr_t *` pointing to an array. But that could only
work if you'd know the size in advance...

It seems the code is not even build tested. I suggest to postpone this
review until there is a platform that uses ACPI_COMMON_MADT_GICC_V3.