Remap and virtualize mixer controls for HP nx6110 with AD1981B AC97 codec, unifying master volume control.
Remap and virtualize mixer controls for HP nx6110 with
AD1981B AC97 codec, unifying master volume control.

  * Remap "phout" --> SOUND_MIXER_VOLUME (internal speakers)
  * Virtual "vol" --> { "phout", "ogain" (headphone) }

Tested by:	Frederic Chardon
MFC after:	3 days

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