ASoC: Intel: Enable bytcht_nocodec machine driver

Make sure this machine driver is only used if enabled explicitly
and if there is no information found in the SSDT.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>