[L] Change in coreboot[main]: mb/dell: Add Latitude E5530 (Ivy Bridge)

[Nicholas Chin (Code Review)]

Attention is currently required from: Nicholas Chin.

Hello build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/82125?usp=email

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

The following approvals got outdated and were removed: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

Change subject: mb/dell: Add Latitude E5530 (Ivy Bridge)
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mb/dell: Add Latitude E5530 (Ivy Bridge)

Mainboard is QXW10/LA-7902P (UMA). I do not physically have this board;
someone with physical access to one sent me the output of autoport which
I then modified to produce this port. I was also sent the VBT binary,
which was obtained from `/sys/kernel/debug/dri/0/i915_vbt` while running
version A21 of the vendor firmware.

This was originally tested and found to be working as a standalone board
port in Libreboot, but this variant based port in upstream coreboot has
not been tested.

This can be internally flashed by sending a command to the EC, which
causes the EC to pull the FDO pin low and the firmware to skip setting
up any chipset based write protections [1]. The EC is the SMSC MEC5055,
which seems to be compatible with the existing MEC5035 code.

Change-Id: Idaf6618df70aa19d8e60b2263088737712dec5f0
Signed-off-by: Nicholas Chin 
---
M src/mainboard/dell/snb_ivb_latitude/Kconfig
M src/mainboard/dell/snb_ivb_latitude/Kconfig.name
A src/mainboard/dell/snb_ivb_latitude/variants/e5530/data.vbt
A src/mainboard/dell/snb_ivb_latitude/variants/e5530/early_init.c
A src/mainboard/dell/snb_ivb_latitude/variants/e5530/gpio.c
A src/mainboard/dell/snb_ivb_latitude/variants/e5530/hda_verb.c
A src/mainboard/dell/snb_ivb_latitude/variants/e5530/overridetree.cb
7 files changed, 290 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/25/82125/3