[L] Change in coreboot[main]: mb/asrock: Add Z77 Extreme4

[Riku Viitanen (Code Review)]

Attention is currently required from: Angel Pons, Riku Viitanen.

Hello Angel Pons, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/85772?usp=email

to look at the new patch set (#12).

The following approvals got outdated and were removed:
Verified+1 by build bot (Jenkins)

Change subject: mb/asrock: Add Z77 Extreme4
......................................................................

mb/asrock: Add Z77 Extreme4

New port based on logs extracted from a board running OEM firmware.
VBT extracted from a running system with "intelvbttool --inlegacy".

Tested:
- i7-3770K CPU (native raminit)
- 2x8GB: G.skill F3-1600C9-8GAR (@1600MHz)
- 4x8GB: Corsair CMY16GX3M2A2400C (@1333MHz)
- libgfxinit txtmode with onboard HDMI, DVI and VGA
- Gigabit Ethernet
- CPU fan
- PS/2 keyboard or mouse (but not at the same time)
- SeaBIOS 1.16.3 booting to Devuan and Void Linux
- All internal SATA ports
- Rear USB ports
- Line out
- me_cleaner
- PCIe x16 slots, including automatic bifurcation (x8/x8)
- PCI slots
- Suspend and resume (S3)
- Serial port header COM1 (including coreboot output)

Untested:
- Intel VBIOS
- USB headers
- Other fans
- LED headers
- eSATA, SPDIF
- PCIe x1 slots

Change-Id: Idf028c6d411bd501b73a3c526240d0b1d6ecaa0c
Signed-off-by: Riku Viitanen 
---
A src/mainboard/asrock/z77_extreme4/Kconfig
A src/mainboard/asrock/z77_extreme4/Kconfig.name
A src/mainboard/asrock/z77_extreme4/Makefile.mk
A src/mainboard/asrock/z77_extreme4/acpi/ec.asl
A src/mainboard/asrock/z77_extreme4/acpi/platform.asl
A src/mainboard/asrock/z77_extreme4/acpi/superio.asl
A src/mainboard/asrock/z77_extreme4/board_info.txt
A src/mainboard/asrock/z77_extreme4/cmos.default
A src/mainboard/asrock/z77_extreme4/cmos.layout
A src/mainboard/asrock/z77_extreme4/data.vbt
A src/mainboard/asrock/z77_extreme4/devicetree.cb
A src/mainboard/asrock/z77_extreme4/dsdt.asl
A src/mainboard/asrock/z77_extreme4/early_init.c
A src/mainboard/asrock/z77_extreme4/gma-mainboard.ads
A src/mainboard/asrock/z77_extreme4/gpio.c
A src/mainboard/asrock/z77_extreme4/hda_verb.c
A src/mainboard/asrock/z77_extreme4/mainboard.c
17 files changed, 621 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/72/85772/12