FROMLIST: ASoC: SOF: Add Nocodec machine driver support

Add a simple "fallback" machine driver that can be used to enable SOF
on boards with no codec device. This machine driver can also be forced
for debug/development.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
(cherry picked from commit 333d093d9febee268fbda4b0f62c6ac5a644fb8d)
Link:https://github.com/thesofproject/linux/commit/333d093d9febee268fbda4b0f62c6ac5a644fb8d


Signed-off-by: Samaga Prasanna Krishna <samaga.krishna@intel.corp-partner.google.com>

BUG=b:110025789
TEST=Test Audio use cases after full SOF series patches are applied.

Change-Id: Ib2fc250245f295cdde82bf4885c9ef43882d5acd
Reviewed-on: https://chromium-review.googlesource.com/1120596


Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Curtis Malainey <cujomalainey@chromium.org>
Reviewed-by: Curtis Malainey <cujomalainey@chromium.org>