Change in coreboot[master]: mb/system76/darp7: Add System76 Darter Pro 7

[Tim Crawford (Code Review)]

Attention is currently required from: Tim Crawford, Jeremy Soller.
Hello build bot (Jenkins), Jeremy Soller,

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

https://review.coreboot.org/c/coreboot/+/52349

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

Change subject: mb/system76/darp7: Add System76 Darter Pro 7
......................................................................

mb/system76/darp7: Add System76 Darter Pro 7

https://tech-docs.system76.com/models/darp7/README.html

Tested with TianoCore (UefiPayloadPkg).

Working:

- PS/2 keyboard, touchpad
- Both DIMM slots
- M.2 NVMe SSD
- M.2 SATA SSD
- All USB ports
- USB-PD
- Webcam
- Ethernet
- Integrated graphics using Intel GOP driver
- HDMI output
- DP over USB-C output
- Internal microphone
- Internal speakers
- Combined headphone + mic 3.5mm jack
- Booting to Ubuntu Linux 21.04 and Windows 10

Not working:

- S0ix (no PC10 residency)
- Flashing with flashrom (chipset not supported)

Not tested:

- Thunderbolt functionality

Change-Id: I80e5c5375f9d3881fc89a45a91ba68ed2e104a93
Signed-off-by: Jeremy Soller 
Signed-off-by: Tim Crawford 
---
M Documentation/mainboard/index.md
A Documentation/mainboard/system76/darp7.md
A src/mainboard/system76/darp7/Kconfig
A src/mainboard/system76/darp7/Kconfig.name
A src/mainboard/system76/darp7/Makefile.inc
A src/mainboard/system76/darp7/acpi/mainboard.asl
A src/mainboard/system76/darp7/acpi/sleep.asl
A src/mainboard/system76/darp7/board_info.txt
A src/mainboard/system76/darp7/bootblock.c
A src/mainboard/system76/darp7/data.vbt
A src/mainboard/system76/darp7/devicetree.cb
A src/mainboard/system76/darp7/dsdt.asl
A src/mainboard/system76/darp7/gpio.h
A src/mainboard/system76/darp7/hda_verb.c
A src/mainboard/system76/darp7/ramstage.c
A src/mainboard/system76/darp7/romstage.c
16 files changed, 883 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/49/52349/7