Squashed revert of SPDIF audio support

Recent Samsung devices do not have a dedicated ALSA card for
digital clocks.

Revert "treltexx: Align SPDIF audio device enums to the rest"

This reverts commit 13a630c44f6a9a132765b47cb636b8a16ec78537.

Revert "audio: force standby when entering/leaving SPDIF mode"

This reverts commit e5bc430519002ea63b538cb4195dd186e9f7358d.

Change-Id: Idf3e8f8fb29b4d7f6b7b1b8027962e08743fe3e5

Revert "audio: add digital dock (SPDIF) support"

This reverts commit 582850d82b1d36b18eab01932c3fec4780817d01.

Change-Id: I1cc819e98e813a803192fbc991a518de622bf522