[coreboot-gerrit] [XS] Change in coreboot[main]: intel/block/pcie/rtd3: Also implement _PR3

[Sean Rhodes (Code Review)]

Attention is currently required from: Jeremy Soller, Tim Crawford.

Sean Rhodes has posted comments on this change by Tim Crawford. ( https://review.coreboot.org/c/coreboot/+/50598?usp=email )

Change subject: intel/block/pcie/rtd3: Also implement _PR3
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Patch Set 5: Code-Review+1

(1 comment)

Patchset:

PS5: 
Maybe:

```
Previously, only _PR0 was specified, which allowed devices to enter D0.  
Add _PR3 to allow the same devices to enter D3Cold, enabling proper runtime  
power management for devices that support it.
```