Change in coreboot[master]: sb/intel/bd82x6x: Disable unused bridges

[Arthur Heymans (Code Review)]

Arthur Heymans has posted comments on this change. ( https://review.coreboot.org/19818 )

Change subject: sb/intel/bd82x6x: Disable unused bridges
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Patch Set 3: Code-Review+2
> > On my x200/ICH9 all SB PCIe functions seem to support hotplug.
> > How is the situation on bd82x6x?
>
> All ports support hotplug. But you won't use all of them. For that
> reason you can select which of them are used (for Express card) by
> using a devicetree array. On my board with current devixetree, no
> ports would be disabled as two are in use and one is marked hotplug
> let. It's only useful if you remove on the PCIe devices (like WiFi
> card).

wups, I missed that.

This is good default behavior, people wanting to change it can modify devicetree.