[M] Change in coreboot[main]: mb/google/nissa/var/riven: Disable unused GPIOs based on fw_config

[Kapil Porwal (Code Review)]

Attention is currently required from: David Wu, Dinesh Gehlot, Eric Lai, Nick Vaccaro, Subrata Banik.

Kapil Porwal has posted comments on this change by David Wu. ( https://review.coreboot.org/c/coreboot/+/83062?usp=email )

Change subject: mb/google/nissa/var/riven: Disable unused GPIOs based on fw_config
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Patch Set 2:

(1 comment)

File src/mainboard/google/brya/variants/riven/fw_config.c:

https://review.coreboot.org/c/coreboot/+/83062/comment/bed82d7e_a6eb4c58?usp... :
PS2, Line 69: {
Config for WFC and Stylus are still unguarded. You can add a common condition here -

```
    if (!fw_config_is_provisioned()) {
    	printk(BIOS_INFO, "FW_CONFIG is not provisioned. Exiting...\n");
    	return;
    }

```