[WIP] mb/acer: Add Acer E5-573 mainboard

Boots to Linux, things still very WIP.

The `acer_e5-573.dfc` file is the defconfig I have used. Using master
with CB:37553 and CB:37568 (this change), this produces a coreboot.rom
that can boot Arch Linux with on-disk GRUB. While the whole thing is
more or less usable (I am typing this commit message on this laptop with
coreboot, a bunch of things are still completely broken...

Tested and known to be working:

- At least one SATA port
- USB ports
- PCIe ports of the Ethernet and Wi-Fi NICs
- Fan is spinning
- Internal eDP display with libgfxinit
- Display backlight on Linux with intel_backlight
- Audio from speakers
- UART 0 TXD for coreboot logs (wired to pin 4 of the VGA port, lol)
- Memory initialization with two DIMMs
- SMBus to read DIMM SPDs
- Internal PS/2 keyboard
- Internal flashing

Tested and known to be broken:

- PCIe port 1c.3 spams dmesg with AER errors about timeouts.
- Too many PCIe ports are enabled.
- Touchpad is dead.
- Internal keyboard might be missing some ACPI devices. Linux has
  problems to detect it.
- Poweroff takes a looooong time.
- Function keys are dead: brightness, volume, Fn+Fx... However, the
  "media" keys (play, pause, previous, next) do work fine.
- Looks like the MRC retrains all the time. Maybe it is not saving
  training data at all.
- The EC firmware is shared with the main flash. Currently, it is very
  easy to overwrite it by accident and have a brick. It is probably at
  the beginning of the BIOS region, like other ITE ECs.
- Pressing Num Lock makes weird things happen. *presses Num Lock*
  *ress5ng N40 36c2 0a2es we5rd th5ngs ha**en. **resses N40 36c2*
- The fan is working. ALWAYS. IT SOUNDS LIKE A JET ENGINE.
- The battery is working, but no ACPI device for it exists, so it's like
  the lottery. Remember to save your work!
- ACPI lid device is probably missing.

Not tested:

- S3 resume. Likely broken.
- Headphones jack. Need to double-check these Azalia spells.
- Other payloads.
- Windows.
- Webcam. It probably works, but is covered with electrical tape.
- Mike the microphone.
- xHCI devices on the USB 3.0 ports.
- Need to fine-tune HSIO PHYs. THE ULTIMATE SYMPHONY!
- Making the thing boot off LPC.

Change-Id: I3ae188ee1dcbb6dfcf825eabdc31c041095aab13
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
---
A acer_e5-573.dfc
A src/mainboard/acer/e5-573/Kconfig
A src/mainboard/acer/e5-573/Kconfig.name
A src/mainboard/acer/e5-573/Makefile.inc
A src/mainboard/acer/e5-573/acpi/ec.asl
A src/mainboard/acer/e5-573/acpi/mainboard.asl
A src/mainboard/acer/e5-573/acpi/superio.asl
A src/mainboard/acer/e5-573/acpi_tables.c
A src/mainboard/acer/e5-573/board_info.txt
A src/mainboard/acer/e5-573/devicetree.cb
A src/mainboard/acer/e5-573/dsdt.asl
A src/mainboard/acer/e5-573/early_init.c
A src/mainboard/acer/e5-573/fadt.c
A src/mainboard/acer/e5-573/gma-mainboard.ads
A src/mainboard/acer/e5-573/gpio.c
A src/mainboard/acer/e5-573/hda_verb.c
A src/mainboard/acer/e5-573/mainboard.c
A src/mainboard/acer/e5-573/pei_data.c
A src/mainboard/acer/e5-573/romstage.c
M src/superio/Makefile.inc
20 files changed, 650 insertions(+), 0 deletions(-)