[L] Change in coreboot[main]: mb/asus/p8x7x-series: Add P8H77-M as a variant

[Felix Singer (Code Review)]

Attention is currently required from: Fabian Groffen, Keith Hui, Kevin Keijzer.

Felix Singer has uploaded a new patch set (#5) to the change originally created by Kevin Keijzer. ( https://review.coreboot.org/c/coreboot/+/78806?usp=email )

Change subject: mb/asus/p8x7x-series: Add P8H77-M as a variant
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mb/asus/p8x7x-series: Add P8H77-M as a variant

This board is based off the P8H77-V, which is quite similar.

Tested with:

CPUs:
- Core i5-3330
- Core i5-3570S
- Core i7-3770
- Core i7-3770S

RAM:
- 2x Patriot Viper DDR3-1600 8GB CL9
- 4x Patriot Viper DDR3-1600 8GB CL9
- 4 DIMMs at 1600MHz with CONFIG_NATIVE_RAMINIT_IGNORE_XMP_MAX_DIMMS=y

OS:
- Debian 12
- Ubuntu 22.04

Working:
- Integrated graphics with libgfxinit (HDMI, DVI, VGA)
- SeaBIOS payload booting from SATA3 and USB3
- GRUB2 payload booting from SATA3 and USB3
- All rear USB2 and USB3 ports
- All internal USB2 and USB3 headers
- All rear audio ports (line out, speakers, microphone)
- Front panel HD audio header (headphones and microphone)
- Toslink S/PDIF audio out
- HDMI audio out
- S3 sleep and resume
- SuperIO sensors (with lm-sensors)
- Fan control (with pwmconfig)

Not tested:
- PCI Express slots
- PCI slot
- LPT header
- COM1 header

Partially working:
- Realtek RTL8111F GbE NIC
(The NIC works, but the MAC address is not set properly)
See https://mail.coreboot.org/hyperkitty/list/[e-mail]/thread/ZVHCI...

Change-Id: I846e61303db0ad24569dcb713f0505d670fde1bd
Signed-off-by: Kevin Keijzer 
---
M src/mainboard/asus/p8x7x-series/Kconfig
M src/mainboard/asus/p8x7x-series/Kconfig.name
A src/mainboard/asus/p8x7x-series/variants/p8h77-m/board_info.txt
A src/mainboard/asus/p8x7x-series/variants/p8h77-m/cmos.default
A src/mainboard/asus/p8x7x-series/variants/p8h77-m/cmos.layout
A src/mainboard/asus/p8x7x-series/variants/p8h77-m/data.vbt
A src/mainboard/asus/p8x7x-series/variants/p8h77-m/early_init.c
A src/mainboard/asus/p8x7x-series/variants/p8h77-m/gma-mainboard.ads
A src/mainboard/asus/p8x7x-series/variants/p8h77-m/gpio.c
A src/mainboard/asus/p8x7x-series/variants/p8h77-m/hda_verb.c
A src/mainboard/asus/p8x7x-series/variants/p8h77-m/overridetree.cb
11 files changed, 477 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/06/78806/5