[M] Change in coreboot[main]: mb/google/brox: Adding support for batteryless booting

[Angel Pons (Code Review)]

Attention is currently required from: Deepti Deshatty, Paul Menzel, Shelley Chen.

Angel Pons has posted comments on this change by Shelley Chen. ( https://review.coreboot.org/c/coreboot/+/83087?usp=email )

Change subject: mb/google/brox: Adding support for batteryless booting
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Patch Set 3:

(2 comments)

File src/mainboard/google/brox/variants/baseboard/brox/ramstage.c:

https://review.coreboot.org/c/coreboot/+/83087/comment/927dc18e_ac1f1c4f?usp... :
PS3, Line 32: 		printk(BIOS_ERR, "Cannot find correct intel sku index.\n");
> Add array size to the message?

I'd rather print `mchid`

https://review.coreboot.org/c/coreboot/+/83087/comment/e1630cf7_e7319a11?usp... :
PS3, Line 110: 	/* const struct device *policy_dev; */
Remove commented out thing?