[XS] Change in coreboot[main]: mb/google/fatcat: Add FW_CONFIG Support for ALC721 soundwire

[Subrata Banik (Code Review)]

Attention is currently required from: Anil Kumar K, Pranava Y N, Varun Upadhyay.

Subrata Banik has posted comments on this change by Varun Upadhyay. ( https://review.coreboot.org/c/coreboot/+/85074?usp=email )

Change subject: mb/google/fatcat: Add FW_CONFIG Support for ALC721 soundwire
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Patch Set 2:

(1 comment)

File src/mainboard/google/fatcat/variants/fatcat/overridetree.cb:

https://review.coreboot.org/c/coreboot/+/85074/comment/aeea75c9_fd20c0fd?usp... :
PS2, Line 8: AUDIO_ALC721_SNDW
knowing we can have either one AIC between ALC721 or ALC722 while both selects the same driver, do we need a separate FW config ?

can this be handled using ```AUDIO_ALC72x_SNDW``` below code ?

```
chip drivers/intel/soundwire
    device generic 0 on
    	chip drivers/soundwire/alc711
    		# SoundWire Link 1 ID 1
    		register "desc" = ""Headset Codec""
    		device generic 1.1 on
    			probe AUDIO AUDIO_ALC72x_SNDW
    		end
    	end
    end
end
```

or `# SoundWire Link 3 ID 1` is the meaningful here ?