Change in coreboot[master]: soc/amd/cezanne: Disable legacy DMA IO ports

[Felix Held (Code Review)]

Attention is currently required from: Jason Glenesk, Raul Rangel, Paul Menzel, Angel Pons.
Felix Held has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/51076 )

Change subject: soc/amd/cezanne: Disable legacy DMA IO ports
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Patch Set 2:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/51076/comment/6a3b09d0_7be77597 
PS2, Line 10: ports.
> ok

had a look and didn't find any mainboard that is compatible with the renoir/cezanne apus and still has a fdd connector. there are very few compatible or possibly compatible mainboards that still have a parallel port on an internal connector and since it can be operated in a mode that doesn't require the legacy isa dma to be present, i don't really expect this to break things. also the ports around 0x80 don't get decoded to the isa dma controller, so it's unclear it that has a chance to work with the default that doesn't decode those ports to isa dma