[S] Change in libgfxinit[main]: gma display_probing: Make new TGL ports available

[Nico Huber (Code Review)]

Attention is currently required from: Angel Pons, Dinesh Gehlot, Elyes Haouas, Paul Menzel, Thomas Heijligen.

Nico Huber has posted comments on this change by Nico Huber. ( https://review.coreboot.org/c/libgfxinit/+/81522?usp=email )

Change subject: gma display_probing: Make new TGL ports available
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Patch Set 7:

(1 comment)

File common/hw-gfx-gma-display_probing.adb:

https://review.coreboot.org/c/libgfxinit/+/81522/comment/afe19fa6_ddd8c6b5?u... :
PS7, Line 38:    function Sibling_Port (Port : Port_Type) return Port_Type is
> Hmmmmm, wait. […]

Yep, the new naming makes this more obvious. The TC ports can also be implemented
as DP and HDMI at the same time. So in theory, can suffer from the same issues.
(though, I have to admit that I only saw this with 10y old ThinkPad docks where
you really can physically connect two competing displays at the same time)