mb/system76/adl-p: Add Darter Pro 8

The Darter Pro 8 (darp8) is an Alder Lake-P board.

Tested with a custom TianoCore UefiPayloadPkg.

Working:

- PS/2 keyboard, touchpad
- Both DIMM slots (with NMSO480E82-3200EA00)
- M.2 NVMe SSD (with MZVL2500HCJQ)
- M.2 SATA SSD (with WDS100T2B0B)
- All USB ports
- SD card reader
- Webcam
- Ethernet
- WiFi/Bluetooth
- Integrated graphics using Intel GOP driver
- Backlight controls on Windows 10 and Linux 6.1
- HDMI output
- DisplayPort output over USB-C
- Internal microphone
- Internal speakers
- Combined header + mic 3.5mm audio
- S0ix suspend/resume
- Booting Pop!_OS Linux 22.04 with kernel 5.18.5
- Internal flashing with flashrom v1.2-703-g76118a7c10ed

Not working:

- Detection of devices in TBT slot on boot

Change-Id: Icc84d6cc3aec7149d9b538305288bbe2b56d53e4
Signed-off-by: Tim Crawford <tcrawford@system76.com>
---
M Documentation/mainboard/index.md
A Documentation/mainboard/system76/darp8.md
A src/mainboard/system76/adl-p/Kconfig
A src/mainboard/system76/adl-p/Kconfig.name
A src/mainboard/system76/adl-p/Makefile.inc
A src/mainboard/system76/adl-p/acpi/backlight.asl
A src/mainboard/system76/adl-p/acpi/mainboard.asl
A src/mainboard/system76/adl-p/acpi/sleep.asl
A src/mainboard/system76/adl-p/board_info.txt
A src/mainboard/system76/adl-p/bootblock.c
A src/mainboard/system76/adl-p/cmos.default
A src/mainboard/system76/adl-p/cmos.layout
A src/mainboard/system76/adl-p/devicetree.cb
A src/mainboard/system76/adl-p/dsdt.asl
A src/mainboard/system76/adl-p/include/mainboard/gpio.h
A src/mainboard/system76/adl-p/ramstage.c
A src/mainboard/system76/adl-p/variants/darp8/board_info.txt
A src/mainboard/system76/adl-p/variants/darp8/data.vbt
A src/mainboard/system76/adl-p/variants/darp8/gpio.c
A src/mainboard/system76/adl-p/variants/darp8/gpio_early.c
A src/mainboard/system76/adl-p/variants/darp8/hda_verb.c
A src/mainboard/system76/adl-p/variants/darp8/overridetree.cb
A src/mainboard/system76/adl-p/variants/darp8/romstage.c
23 files changed, 984 insertions(+), 0 deletions(-)