[L] Change in coreboot[main]: mb/dell: Add Latitude E6530 (Ivy Bridge)

[Nicholas Chin (Code Review)]

Attention is currently required from: Nicholas Chin, Paul Menzel.

Hello build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/79012?usp=email

to look at the new patch set (#4).

The following approvals got outdated and were removed: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

Change subject: mb/dell: Add Latitude E6530 (Ivy Bridge)
......................................................................

mb/dell: Add Latitude E6530 (Ivy Bridge)

Mainboard is QALA0/LA-7761P (UMA). The version with a Nvidia dGPU was
not tested. I do not physically have this system; 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 vbios obtained using intel_bios_dumper while running
version A22 of the vendor firmware, which I then processed using
`intelvbttool --inoprom vbios.bin --outvbt data.vbt` to obtain data.vbt.

This was originally tested and found to be working as a standalone board
port in Libreboot, though 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.

[1] https://gitlab.com/nic3-14159/dell-flash-unlock

Change-Id: I9fcd73416018574f8934962f92c8222d0101cb71
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/e6530/data.vbt
A src/mainboard/dell/snb_ivb_latitude/variants/e6530/early_init.c
A src/mainboard/dell/snb_ivb_latitude/variants/e6530/gpio.c
A src/mainboard/dell/snb_ivb_latitude/variants/e6530/hda_verb.c
A src/mainboard/dell/snb_ivb_latitude/variants/e6530/overridetree.cb
7 files changed, 287 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/12/79012/4