Hi Takashi.

This reworks snd_ad1848_probe(), making for IMO significantly more 
straightforward reading.

The original had a somewhat odd try-loop where it not only waited for 
the codec to come out of init but also retried a failed basic detect 
which seems to not make sense. Except for that, the detection logic 
should be unchanged.

I am by the way rather unsure what it is that the spin_lock is trying to 
protect us from here. What's the error scenario if we just not take it? 
We aren't live yet...

Next step is folding this into snd_wss_probe() directly.

Rene.