Change in coreboot[master]: mb/google/cherry: Add PCIe domain support

[Yu-Ping Wu (Code Review)]

Attention is currently required from: Hung-Te Lin, Shelley Chen, Paul Menzel, Angel Pons, Jianjun Wang.
Yu-Ping Wu has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/62360 )

Change subject: mb/google/cherry: Add PCIe domain support
......................................................................

Patch Set 8:

(2 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/62360/comment/fe92ad63_966e3313 
PS8, Line 11: TEST
Please also test this patch by building and running tomato's firmware, and verify that it doesn't try to initialize PCIe on tomato.

File src/mainboard/google/cherry/devicetree.cb:

PS8: 
As mentioned in CBL56793, can we have a different devicetree.cb for dojo (see the DEVICETREE Kconfig option)?