ASoC: SOF: Drop unused IPC type defines

The SOF stack now uses the generic names for the IPC type, the defines can
be dropped.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20230919104226.32239-10-peter.ujfalusi@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

include/sound/sof.h

@@ -57,9 +57,6 @@ enum sof_ipc_type {
 	SOF_IPC_TYPE_COUNT
 };
 
-#define SOF_IPC		SOF_IPC_TYPE_3
-#define SOF_INTEL_IPC4	SOF_IPC_TYPE_4
-
 /*
  * SOF Platform data.
  */