Change in coreboot[master]: mb/intel/dg43gt: Add mainboard

[Arthur Heymans (Code Review)]

Hello Paul Menzel, build bot (Jenkins),

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

https://review.coreboot.org/19256

to look at the new patch set (#6).

Change subject: mb/intel/dg43gt: Add mainboard
......................................................................

mb/intel/dg43gt: Add mainboard

This mainboard features is an G43 northbridge, ICH10 southbridge and
Winbond W83627dhg SuperI/O. This board is impossible to flash
internally with vendor bios (BIOS region is WP and other regions like
IFD and ME are read only and inaccessible respectively). Due to either
ICH10 or board layout it is also impossible to do ISP, which requires
desoldering flash chip. To make hacking more easy there is an empty
SPI header next to spi flash pads which can be hooked up to a SPI
flash.

What works:
* 2 DDR2 dimms per channel (tested with 1+2G in CH0 and 2+2G in CH1);
* SATA
* Integrated GPU with option rom (extracted from a Gigabyte vendor
  bios)
* PCI
* PEG slot with additional patches
* Reboot and S3 resume
* USB.

What does not work:
* GBE (requires descriptor);
* Lots of dmesg spam complaining about interrupt storm on HDMI
  connector.

Not tested:
* Booting with descriptor (most likely fixes GBE);
* ME with descriptor;
* Sound;
* All the rest.

Not coreboot related problems:
* Flashing this board with vendor bios is a PITA and requires
  desoldering flash chip;
* In situ programming is not possible.

TESTED with SeaBIOS and Linux 4.10.8

Change-Id: If27280feb7cbf0a88f19fe6a63b1f6dbcf9b60f4
Signed-off-by: Arthur Heymans 
---
A src/mainboard/intel/dg43gt/Kconfig
A src/mainboard/intel/dg43gt/Kconfig.name
A src/mainboard/intel/dg43gt/Makefile.inc
A src/mainboard/intel/dg43gt/acpi/ec.asl
A src/mainboard/intel/dg43gt/acpi/ich10_pci_irqs.asl
A src/mainboard/intel/dg43gt/acpi/platform.asl
A src/mainboard/intel/dg43gt/acpi/superio.asl
A src/mainboard/intel/dg43gt/acpi/x4x_pci_irqs.asl
A src/mainboard/intel/dg43gt/acpi_tables.c
A src/mainboard/intel/dg43gt/board_info.txt
A src/mainboard/intel/dg43gt/cmos.default
A src/mainboard/intel/dg43gt/cmos.layout
A src/mainboard/intel/dg43gt/cstates.c
A src/mainboard/intel/dg43gt/devicetree.cb
A src/mainboard/intel/dg43gt/dsdt.asl
A src/mainboard/intel/dg43gt/gpio.c
A src/mainboard/intel/dg43gt/hda_verb.c
A src/mainboard/intel/dg43gt/romstage.c
18 files changed, 901 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/56/19256/6