Change in coreboot[master]: device/azalia_device.c: Unify `wait_for_valid` timeouts

[Nico Huber (Code Review)]

Attention is currently required from: Jason Glenesk, Raul Rangel, Marshall Dawson, Angel Pons, Arthur Heymans, Patrick Rudolph, Felix Held.
Nico Huber has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/51634 )

Change subject: device/azalia_device.c: Unify `wait_for_valid` timeouts
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Patch Set 5: Code-Review+2

(2 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/51634/comment/56f94b9e_8734c908 
PS5, Line 16: 25 ms
us ?

File src/device/azalia_device.c:

https://review.coreboot.org/c/coreboot/+/51634/comment/fcf49c7f_00b21ca8 
PS5, Line 185: 	 * use a reasonably long enough timeout to cover all possible cases.
Personally, I'd keep the reasoning to the commit message. It applies to
most timeouts, should they all have such a comment? What is specific to
this code is that we bail out properly (not everyone handles errors that
gracefully).