audio: port the non upstreamed changes

audio: port the non upstreamed changes

BZ: 15246

	move staging sst to sound/
	port sn95031 changes
	port sst_platform and mfld_machine drv
	port the intel-mid-dma driver
	port the intel-sst driver
	asoc:add ignore_pmdown_time flag to dai_link
	(backport for k3.2)

Orignal commit log for asoc backport patch:
ASoC framework delays playback widget power down sequence
by 5 seconds.  This delay is applicable for all the playback
streams.  This delay is not required for voice dai's.

This patch adds ignore_pmdown_time flag to snd_soc_dai_link
structure.  Each dai_link can choose to ignore the pmdown_time
based on board configuration.

commit ID in upstream asoc tree:
e50fad4f029c36ed85a71fe7413684cfd3c7d78c

Change-Id: I50c665d842730cdb5bb54fd1d39680ba3b1fcd5c
Signed-off-by: Vinod Koul <vinod.koul@linux.intel.com>
Reviewed-on: http://android.intel.com:8080/25532
Reviewed-by: Suet, NicolasX <nicolasx.suet@intel.com>
Reviewed-by: Seibel, Eric <eric.seibel@intel.com>
Tested-by: Seibel, Eric <eric.seibel@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>