ASoC: dsp - add core support for bespoke trigger()

This allows the DSP core to call a beskope trigger() call
on DAIs and platforms that require it.

TODO: move into DSP patch series.

Signed-off-by: Liam Girdwood <lrg@ti.com>
diff --git a/include/sound/soc.h b/include/sound/soc.h
index d40c5ea..1885104 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -674,6 +674,8 @@
 	bool early_remove;
 
 	int (*stream_event)(struct snd_soc_dapm_context *dapm);
+	int (*bespoke_trigger)(struct snd_pcm_substream *, int);
+
 	/* platform DAPM IO TODO: refactor this */
 	unsigned int (*read)(struct snd_soc_platform *, unsigned int);
 	int (*write)(struct snd_soc_platform *, unsigned int, unsigned int);