Change in coreboot[master]: mb/google/guybrush: Select VBNV_CMOS

[Furquan Shaikh (Code Review)]

Attention is currently required from: Joel Kitching, Raul Rangel, Martin Roth, Marshall Dawson, Felix Held.
Furquan Shaikh has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/52224 )

Change subject: mb/google/guybrush: Select VBNV_CMOS
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Patch Set 1:

(2 comments)

Patchset:

PS1:
> IIRC, newer boards aren't using VBNV_CMOS anymore, and instead directly write to flash with VBNV_FLA […]

That is not really correct. All x86 platforms use VBNV in CMOS:

```
src/soc/amd/picasso/Kconfig:    select VBOOT_VBNV_CMOS
src/soc/amd/picasso/Kconfig:    select VBOOT_VBNV_CMOS_BACKUP_TO_FLASH
src/soc/amd/stoneyridge/Kconfig:        select VBOOT_VBNV_CMOS
src/soc/amd/stoneyridge/Kconfig:        select VBOOT_VBNV_CMOS_BACKUP_TO_FLASH
src/soc/intel/alderlake/Kconfig:        select VBOOT_VBNV_CMOS
src/soc/intel/alderlake/Kconfig:        select VBOOT_VBNV_CMOS_BACKUP_TO_FLASH
src/soc/intel/apollolake/Kconfig:       select VBOOT_VBNV_CMOS
src/soc/intel/apollolake/Kconfig:       select VBOOT_VBNV_CMOS_BACKUP_TO_FLASH
src/soc/intel/cannonlake/Kconfig:       select VBOOT_VBNV_CMOS
src/soc/intel/cannonlake/Kconfig:       select VBOOT_VBNV_CMOS_BACKUP_TO_FLASH
src/soc/intel/elkhartlake/Kconfig:      select VBOOT_VBNV_CMOS
src/soc/intel/elkhartlake/Kconfig:      select VBOOT_VBNV_CMOS_BACKUP_TO_FLASH
src/soc/intel/icelake/Kconfig:  select VBOOT_VBNV_CMOS
src/soc/intel/icelake/Kconfig:  select VBOOT_VBNV_CMOS_BACKUP_TO_FLASH
src/soc/intel/jasperlake/Kconfig:       select VBOOT_VBNV_CMOS
src/soc/intel/jasperlake/Kconfig:       select VBOOT_VBNV_CMOS_BACKUP_TO_FLASH
src/soc/intel/skylake/Kconfig:  select VBOOT_VBNV_CMOS
src/soc/intel/skylake/Kconfig:  select VBOOT_VBNV_CMOS_BACKUP_TO_FLASH
src/soc/intel/tigerlake/Kconfig:        select VBOOT_VBNV_CMOS
src/soc/intel/tigerlake/Kconfig:        select VBOOT_VBNV_CMOS_BACKUP_TO_FLASH
```

File src/mainboard/google/guybrush/Kconfig:

https://review.coreboot.org/c/coreboot/+/52224/comment/b30145cd_19556f0a 
PS1, Line 40: 	select VBOOT_VBNV_CMOS
            : 	select VBOOT_VBNV_CMOS_BACKUP_TO_FLASH
> Maybe put in the soc directory like picasso's?

+1