Change in flashrom[staging]: chipset_enable: Add support for Intel Skylake / Kabylake

[Nico Huber (Code Review)]

Nico Huber has posted comments on this change. ( https://review.coreboot.org/18925 )

Change subject: chipset_enable: Add support for Intel Skylake / Kabylake
......................................................................

Patch Set 6:
> One issue I'm having with this code is that it will segfault at the end.
> I've tracked it down to the rpci_write_byte in enable_flash_ich_bios_cntl_common
> which calls register_undo_pci_write_byte which saves a copy of the pci device,
> but the copy is wrong (pci accessor is somehow set to -1) and it segfaults when
> it tries to restore the pci register in the shutdown handlers.

Thanks for testing and the investigation :)
> I'm not yet sure how to properly fix this.

Actually it was correct in the earlier patch versions. I just forgot about
the rpci_* when restructuring it. Should be fixed now, haven't retested yet.