[L] Change in coreboot[master]: [WIP] ACPI: Add usb_charge_mode_from_gnvs()

[Matt DeVillier (Code Review)]

Attention is currently required from: Lance Zhao, Caveh Jalali, Tim Wawrzynczak, Kyösti Mälkki, Boris Mittelberg.

Matt DeVillier has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/74524 )

Change subject: [WIP] ACPI: Add usb_charge_mode_from_gnvs()
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Patch Set 7:

(1 comment)

File src/mainboard/google/auron/smihandler.c:

https://review.coreboot.org/c/coreboot/+/74524/comment/5dd7c592_407addeb 
PS6, Line 39: 	chromeec_set_usb_charge_mode(slp_typ);
> Seems to me like these are all using GNVS for no reason at all, seems to be a static board customisation value that does not change runtime?

yes, it's very odd, not sure why it was done this way