Change in coreboot[master]: mb/asus/p8x7x: Add P8Z77-V as a variant of P8x7x

[Bill XIE (Code Review)]

Attention is currently required from: Bill XIE.
Hello build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/54338

to look at the new patch set (#2).

Change subject: mb/asus/p8x7x: Add P8Z77-V as a variant of P8x7x
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mb/asus/p8x7x: Add P8Z77-V as a variant of P8x7x

Tested:
- PS/2 keyboard with SeaBIOS
- Integrated NIC
- S3 Suspend to RAM
- USB2 on rear
- USB3 (Z77's and Asmedia's works)
- Integrated SATA
- CPU Temp sensors (tested PSensor on GNU/Linux)
- TPM on TPM-header (tested tpm-tools with TPM 1.2 Infineon SLB9635TT12)
- Native raminit
- Integrated graphics with both libgfxinit (VGA/DVI-D/HDMI tested and working)
- PCIe GPU in PCIe-16x/8x slots (tested using an S3 Matrix)
- Debug output from serial port
- Atheros AR9485 adapted with Wi-Fi Go! Adapter
- Default PCIe config

Signed-off-by: Bill XIE 
Change-Id: Ic56ac0e5f93a6e818ef0666e41996718471b1cf6
---
A Documentation/mainboard/asus/p8z77-v.jpg
A Documentation/mainboard/asus/p8z77-v.md
M Documentation/mainboard/index.md
M src/mainboard/asus/p8x7x/Kconfig
M src/mainboard/asus/p8x7x/Kconfig.name
A src/mainboard/asus/p8x7x/variants/z77-v/acpi_tables.c
A src/mainboard/asus/p8x7x/variants/z77-v/board_info.txt
A src/mainboard/asus/p8x7x/variants/z77-v/data.vbt
A src/mainboard/asus/p8x7x/variants/z77-v/early_init.c
A src/mainboard/asus/p8x7x/variants/z77-v/gma-mainboard.ads
A src/mainboard/asus/p8x7x/variants/z77-v/gpio.c
A src/mainboard/asus/p8x7x/variants/z77-v/hda_verb.c
A src/mainboard/asus/p8x7x/variants/z77-v/mainboard.c
A src/mainboard/asus/p8x7x/variants/z77-v/overridetree.cb
14 files changed, 514 insertions(+), 4 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/38/54338/2