Change in coreboot[master]: soc/mediatek/mt8195: Enable PCIe support for mt8195

[Yu-Ping Wu (Code Review)]

Attention is currently required from: Hung-Te Lin, Arthur Heymans, Paul Menzel.
Yu-Ping Wu has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/56793 )

Change subject: soc/mediatek/mt8195: Enable PCIe support for mt8195
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Patch Set 18:

(2 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/56793/comment/bf34b487_3a302f0b 
PS18, Line 7:  for mt8195
Can be removed.

File src/soc/mediatek/mt8195/Kconfig:

https://review.coreboot.org/c/coreboot/+/56793/comment/9aad5a23_b5b4fbc5 
PS8, Line 13: 	select PCIE_MEDIATEK
> On the other hand, if there's no easy way to do that

CB:62360, which actually enables PCI, is done using coreboot device tree (at least from the patch chain that is the only mainboard CL). I'm not sure if we want to have a devicetree.cb per board.