[XS] Change in coreboot[main]: mb/google/rauru: Determine PCIe init by storage_id

[Yidi Lin (Code Review)]

Attention is currently required from: Hung-Te Lin, Yu-Ping Wu.

Yidi Lin has posted comments on this change by Yidi Lin. ( https://review.coreboot.org/c/coreboot/+/85828?usp=email )

Change subject: mb/google/rauru: Determine PCIe init by storage_id
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Patch Set 2:

(1 comment)

File src/mainboard/google/rauru/mainboard.c:

https://review.coreboot.org/c/coreboot/+/85828/comment/bba815b8_fb18a93f?usp... :
PS2, Line 52: 	return storage_id() == 3;
> Can we modify `storage_type()` to return `enum storage_type` (by renaming `ufs_type`)? We could use  […]

I am thinking if we could follow pcie/regulator that has a `soc/storage.h` and a `mainboard_get_storage_type` API. We can also move above definitions to `soc/storage.h`. What do you think ?