[coreboot-gerrit] Change in coreboot[master]: soc/mediatek: Add PCIe support

[Paul Menzel (Code Review)]

Attention is currently required from: Shelley Chen, Hung-Te Lin, Furquan Shaikh, Angel Pons, Yu-Ping Wu, Jianjun Wang.
Paul Menzel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/56791 )

Change subject: soc/mediatek: Add PCIe support
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Patch Set 9:

(4 comments)

File src/soc/mediatek/common/Kconfig:

https://review.coreboot.org/c/coreboot/+/56791/comment/b960970e_72c1a039 
PS9, Line 45: PCIE_MEDIATEK_GEN3
Can this be made a generic option/name? Should the config `PCI` in `src/device/Kconfig` be made user configurable?

https://review.coreboot.org/c/coreboot/+/56791/comment/7c52cbc0_5a2e6736 
PS9, Line 45: config PCIE_MEDIATEK_GEN3
Is this used already in this change-set?

File src/soc/mediatek/common/pcie.c:

https://review.coreboot.org/c/coreboot/+/56791/comment/55b98f5f_45dab26a 
PS6, Line 174: static int mtk_pcie_dev_assign_resource(struct device *dev,
> Paul, does the explanation above sound reasonable to you?

Yes, thank you.

File src/soc/mediatek/common/pcie.c:

https://review.coreboot.org/c/coreboot/+/56791/comment/2ec5c2ad_cc242e48 
PS9, Line 161: 	printk(BIOS_INFO, "%s: PCIe link up success\n", __func__);
Can you print out how long it actually took (how many retries)?