Change in coreboot[master]: libpayload/pci: Add support for bus mapping

[Jianjun Wang (Code Review)]

Attention is currently required from: Hung-Te Lin, Shelley Chen, Angel Pons, Jianjun Wang.
Hello Shelley Chen, Hung-Te Lin, build bot (Jenkins), Angel Pons, Yu-Ping Wu, 

I'd like you to reexamine a change. Please visit

    https://review.coreboot.org/c/coreboot/+/56789

to look at the new patch set (#48).

Change subject: libpayload/pci: Add support for bus mapping
......................................................................

libpayload/pci: Add support for bus mapping

Move the common APIs to pci_common.c and others to the chip related
file.

TEST=Build pass and boot up to kernel successfully via SSD on Dojo
board, here is the SSD information in boot log:
 == NVME IDENTIFY CONTROLLER DATA ==
    PCI VID   : 0x15b7
    PCI SSVID : 0x15b7
    SN        : 21517J440114
    MN        : WDC PC SN530 SDBPTPZ-256G-1006
    RAB       : 0x4
    AERL      : 0x7
    SQES      : 0x66
    CQES      : 0x44
    NN        : 0x1
Identified NVMe model WDC PC SN530 SDBPTPZ-256G-1006

BUG=b:178565024
BRANCH=cherry

Signed-off-by: Jianjun Wang <[e-mail]>
Change-Id: Ie74801bd4f3de51cbb574e86cd9bb09931152554
---
M payloads/libpayload/Kconfig
M payloads/libpayload/drivers/Makefile.inc
A payloads/libpayload/drivers/pci_io_ops.c
A payloads/libpayload/drivers/pci_map_bus_ops.c
R payloads/libpayload/drivers/pci_ops.c
M payloads/libpayload/include/pci.h
6 files changed, 138 insertions(+), 45 deletions(-)


  git pull ssh://review.coreboot.org:29418/coreboot refs/changes/89/56789/48
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Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-Change-Id: Ie74801bd4f3de51cbb574e86cd9bb09931152554
Gerrit-Change-Number: 56789
Gerrit-PatchSet: 48
Gerrit-Owner: Jianjun Wang <[e-mail]>
Gerrit-Reviewer: Angel Pons <[e-mail]>
Gerrit-Reviewer: Hung-Te Lin <[e-mail]>
Gerrit-Reviewer: Jianjun Wang <[e-mail]>
Gerrit-Reviewer: Shelley Chen <[e-mail]>
Gerrit-Reviewer: Yu-Ping Wu <[e-mail]>
Gerrit-Reviewer: build bot (Jenkins) <[e-mail]>
Gerrit-CC: Furquan Shaikh <[e-mail]>
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Gerrit-CC: Paul Menzel <[e-mail]>
Gerrit-CC: Rex-BC Chen <[e-mail]>
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Gerrit-Attention: Shelley Chen <[e-mail]>
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Gerrit-MessageType: newpatchset