ALC883/888
          3stack-dig    3-jack with SPDIF I/O
          6stack-dig    6-jack digital with SPDIF I/O
          3stack-6ch    3-jack 6-channel
          3stack-6ch-dig 3-jack 6-channel with SPDIF I/O
          6stack-dig-demo  6-jack digital for Intel demo board
          acer          Acer laptops (Travelmate 3012WTMi, Aspire 5600, etc)
          acer-aspire   Acer Aspire 9810
          medion        Medion Laptops
          medion-md2    Medion MD2
          targa-dig     Targa/MSI
          targa-2ch-dig Targs/MSI with 2-channel
          laptop-eapd   3-jack with SPDIF I/O and EAPD (Clevo M540JE, M550JE)
          lenovo-101e   Lenovo 101E
          lenovo-nb0763 Lenovo NB0763
          lenovo-ms7195-dig Lenovo MS7195
          haier-w66     Haier W66
          3stack-hp     HP machines with 3stack (Lucknow, Samba boards)
          6stack-dell   Dell machines with 6stack (Inspiron 530)
          mitac         Mitac 8252D
          clevo-m720    Clevo M720 laptop series
          fujitsu-pi2515 Fujitsu AMILO Pi2515
          auto          auto-config reading BIOS (default)