Change in coreboot[master]: libpayload/pci: Split PCI interfaces as common and chip related

[Yu-Ping Wu (Code Review)]

Attention is currently required from: Shelley Chen, Hung-Te Lin, Jianjun Wang.
Yu-Ping Wu has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/56789 )

Change subject: libpayload/pci: Split PCI interfaces as common and chip related
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Patch Set 12:

(2 comments)

File payloads/libpayload/Kconfig:

https://review.coreboot.org/c/coreboot/+/56789/comment/400bab8a_ed0c4008 
PS12, Line 418: 
Similar to coreboot's implementation, could we add ECAM_MMCONF_SUPPORT and ECAM_MMCONF_BASE_ADDRESS?

File payloads/libpayload/drivers/pci_map_bus_ops.c:

PS12: 
Based on Shelly's design doc [1], should we call this pci_mmio_ops.c?

[1] https://review.coreboot.org/plugins/gitiles/coreboot/+/refs/changes/61/57861...