[M] Change in libgfxinit[main]: gma tgl: Add port detection

[Nico Huber (Code Review)]

Attention is currently required from: Angel Pons, Nick Vaccaro, Nico Huber, Tarun Tuli, Tim Wawrzynczak.

Nico Huber has uploaded a new patch set (#35) to the change originally created by Tim Wawrzynczak. ( https://review.coreboot.org/c/libgfxinit/+/67500?usp=email )

Change subject: gma tgl: Add port detection
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gma tgl: Add port detection

Mostly just detecting the _ISR registers, but during initialization,
this module also blocks TCCOLD so that Modular FIA registers can be
accessed.  Instead of keeping track of the state of TCCOLD all of the
time (and enabling and re-enabling), this patch just blocks TCCOLD
once during initializaton and leaves it that way.

Signed-off-by: Tim Wawrzynczak 
Change-Id: I674e7c2dcd7738e3d76266ff36675dbd52fa5ae2
---
M common/tigerlake/hw-gfx-gma-port_detect.adb
1 file changed, 144 insertions(+), 5 deletions(-)

git pull ssh://review.coreboot.org:29418/libgfxinit refs/changes/00/67500/35