ASoC: Intel: sof_sdw: add missing exit callback

Somehow .exit = sof_sdw_rt_amp_exit was missing in rt1318 codec info.
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20230602202225.249209-2-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/sof_sdw.c

@@ -609,6 +609,7 @@ static struct sof_sdw_codec_info codec_info_list[] = {
 		.direction = {true, true},
 		.dai_name = "rt1318-aif",
 		.init = sof_sdw_rt_amp_init,
+		.exit = sof_sdw_rt_amp_exit,
 		.codec_type = SOF_SDW_CODEC_TYPE_AMP,
 	},
 	{