ASoC: SOF: Introduce generic names for IPC types

Change the enum names for the IPC types to be more descriptive and drop
tying the IPC4 to Intel SoCs.

Add defines to avoid build breakage while the related code is
modified to use the new enum names.
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/20230919104226.32239-2-peter.ujfalusi@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

include/sound/sof.h

@@ -52,11 +52,14 @@ enum sof_dsp_power_states {
 
 /* Definitions for multiple IPCs */
 enum sof_ipc_type {
-	SOF_IPC,
-	SOF_INTEL_IPC4,
+	SOF_IPC_TYPE_3,
+	SOF_IPC_TYPE_4,
 	SOF_IPC_TYPE_COUNT
 };
 
+#define SOF_IPC		SOF_IPC_TYPE_3
+#define SOF_INTEL_IPC4	SOF_IPC_TYPE_4
+
 /*
  * SOF Platform data.
  */