This update for alsa fixes the following issues:

- Backport upstream fixes. (boo#1012594)
- Stall of dmix and others are now in a right PCM state.
- PCM locking scheme refactored.
- Fix SHM initialization race.
- Fix plug PCM memory leaks.
- Improvement of dshare/dmix delay calculation.
- Fix endless dshare draining.
- Fix semaphore discard race fix of direct plugins.
- UCM fixes and updates for DB410c and skylake-r5286.
- Cleaned up Mixer code, so it doesn't install bogus plugin codes.
- Documentation fixes / updates.
- smixer module files got removed from the file list as well.