Change in coreboot[master]: drivers/pcie/generic: Add support to generate code under companion de...

[Cliff Huang (Code Review)]

Attention is currently required from: Bora Guvendik, Raul Rangel, Nico Huber, Cliff Huang, Selma Bensaid, Paul Menzel, Felix Held.
Hello Bora Guvendik, build bot (Jenkins), Raul Rangel, Nico Huber, Selma Bensaid, Tim Wawrzynczak, EricR Lai,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/62301

to look at the new patch set (#7).

Change subject: drivers/pcie/generic: Add support to generate code under companion device instead
......................................................................

drivers/pcie/generic: Add support to generate code under companion device instead

Only one ACPI device should be added to a PCIe root port. For the root
ports which already have device created, the generated code from this
driver needs to be merged with the existing device.

By default, this driver will create new device named DEV0.
This change allows to generate code under an existing device.

ex: (generate code under PXSX):
    Scope (_SB.PCI0.RP01.PXSX)
    {
        Name (_DSD, Package (0x02)  // _DSD: Device-Specific Data
        {
            ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301")
            Package (0x01)
            {
                Package (0x02)
                {
                    "UntrustedDevice",
                    One
                }
            }
        })
    }

BUG=b:221250331
BRANCH=firmware-brya-14505.Bre-brya-14505.B

Signed-off-by: Cliff Huang 
Change-Id: I80634bbfc2927f26f2a55a9c244eca517c437079
---
M src/drivers/pcie/generic/chip.h
M src/drivers/pcie/generic/generic.c
2 files changed, 27 insertions(+), 8 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/01/62301/7