[L] Change in coreboot[main]: arch/io.h: Add port I/O functions to other architectures

[Nico Huber (Code Review)]

Attention is currently required from: Alper Nebi Yasak, Arthur Heymans, Jianjun Wang, Julius Werner, Ron Minnich, Shelley Chen, Yu-Ping Wu.

Nico Huber has posted comments on this change by Alper Nebi Yasak. ( https://review.coreboot.org/c/coreboot/+/80372?usp=email )

Change subject: arch/io.h: Add port I/O functions to other architectures
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Patch Set 5:

(1 comment)

File src/device/Kconfig:

https://review.coreboot.org/c/coreboot/+/80372/comment/aaccc5ad_5768f2f7?usp... :
PS5, Line 532: 	  CPU communicate with peripheral devices over PCI I/O space.
> Hmm... […]

`resource_t` is a mere integer. `struct resource` is used to describe resources,
so far. But not directly to access them in an abstract way, i.e. no function
pointers that could point to a PCI controller's specific implementation. What
all the drivers do, AFAICT, is to simply feed `res->base + something` to the
global functions. So the problem seems the same, no matter where the address
comes from.