Revert "wolfson_sound: updated to 1.4.6"

This reverts commit d87f47d7254e9f981735a75d267548aa09eb73b7.
Revert "wolfson_sound: changing the names during merge"

This reverts commit 36479eb77d39e4c680dcce11face5b478706e962.
Revert "wolfson_sound: updated to 1.4.5"

This reverts commit 7add77bac0df48bfd965eedb91676939d6bdddbd.
wolfson_sound: updated to 1.4.7
- reverted some changes supposed to fix the call issues in combination with mic_mode
  and call detection
- mic_mode is now exclusive and not "intelligent" anymore. If you want to make calls,
  switch mic_mode back to default first.

thanks to AndiP
wolfson_sound: updated to 1.4.8
- finally completely neutralize mic_mode to avoid any interference to related registers
  when not used (further fix for call issues with certain firmwares)
Linux 3.0.61