Change in coreboot[master]: soc/intel/cmn/spi: Add ACPI SSDT extension for fast SPI

[Nico Huber (Code Review)]

Attention is currently required from: Subrata Banik, Paul Menzel, Arthur Heymans, Werner Zeh.
Nico Huber has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/63982 )

Change subject: soc/intel/cmn/spi: Add ACPI SSDT extension for fast SPI
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Patch Set 2:

(1 comment)

File src/soc/intel/common/block/spi/spi.c:

https://review.coreboot.org/c/coreboot/+/63982/comment/25576543_0cb920eb 
PS1, Line 117: spi_fill_ssdt
> > What is the issue in reporting the device even if it is visible? From what I have got the PCI driv […]

Right, we mustn't add a device with _HID if there is a discoverable
PCI device.

However, I have no idea how to check something like that. AFAIK, it's
policy to hide these devices on APL, so always adding the SSDT for
APL should be right?