Change in coreboot[master]: asrock/e3c246d4i: Add board

[Arthur Heymans (Code Review)]

Attention is currently required from: Arthur Heymans.
Hello build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/56339

to look at the new patch set (#3).

Change subject: asrock/e3c246d4i: Add board
......................................................................

asrock/e3c246d4i: Add board

This board has upstream Openbmc support so it's quite nice to develop
on.

What is tested:
- ast2500 BMC: video, serial
- 10G NIC
- USB boot: from virtual CD from BMC and real disk
- EDK2 with UefiPayloadPkg
- 8G DIMM in slot0

What does not work:
- SeaBIOS: seems to hang in the menu. Possibly related to running
  options of the 10G NICs

TODO: A lot of things are pretty bare in this port like USB and PCIe
setup, but I don't own schematics so it's hard to improve on that.
No idea what the nuvoton superio is hooked up to either.

Change-Id: I66e168c8af5de9862b0724fa397ecd709843af1a
Signed-off-by: Arthur Heymans 
---
A src/mainboard/asrock/e3c246d4i/Kconfig
A src/mainboard/asrock/e3c246d4i/Kconfig.name
A src/mainboard/asrock/e3c246d4i/Makefile.inc
A src/mainboard/asrock/e3c246d4i/board_info.txt
A src/mainboard/asrock/e3c246d4i/bootblock.c
A src/mainboard/asrock/e3c246d4i/devicetree.cb
A src/mainboard/asrock/e3c246d4i/dsdt.asl
A src/mainboard/asrock/e3c246d4i/gpio.c
A src/mainboard/asrock/e3c246d4i/include/mainboard/gpio.h
A src/mainboard/asrock/e3c246d4i/ramstage.c
A src/mainboard/asrock/e3c246d4i/romstage.c
11 files changed, 1,560 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/39/56339/3