ASoC: Intel: Make sure BDW based machine drivers build for SOF

BDW uses hard coded IPC calls to set SSP, not needed in SOF as SSP is
configured via topology.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mark Brown <broonie@kernel.org>