Change in coreboot[master]: grunt/treeya: add Realtek ALC5682 codec support

[Paul Menzel (Code Review)]

Attention is currently required from: Daniel Kurtz, Kevin Chang, Martin Roth.
Paul Menzel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/56100 )

Change subject: grunt/treeya: add Realtek ALC5682 codec support
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Patch Set 2:

(3 comments)

File src/mainboard/google/kahlee/variants/treeya/audio.c:

https://review.coreboot.org/c/coreboot/+/56100/comment/c775406c_7d75411b 
PS2, Line 22: 0xfedc2000
Can you define a macro for this?

https://review.coreboot.org/c/coreboot/+/56100/comment/9187f9cb_f4a648f9 
PS2, Line 24: 	}
Can one of the checks be moved into the do-while condition?

```
do {
    mmio_dev = dev_find_path(mmio_dev, DEVICE_PATH_MMIO);
    if (mmio_dev == NULL)
    	break;
} while (mmio_dev->path.mmio.addr != 0xfedc2000);
```

https://review.coreboot.org/c/coreboot/+/56100/comment/ca9ca20c_25c3d9e8 
PS2, Line 27: 		return;
Can’t you return already above? Maybe also print an error?