ASoC: wm_adsp: Expose coefficient blocks as ALSA binary controls

Add initial support for runtime tuning for the ADSP cores.  This
is achieved by exposing the coefficient configuration blocks as
ALSA binary controls.
The current code assumes that no controls on the DSP are volatile.
Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/wm_adsp.h

@@ -30,6 +30,7 @@ struct wm_adsp_alg_region {
 	unsigned int alg;
 	int type;
 	unsigned int base;
+	size_t len;
 };
 
 struct wm_adsp {
@@ -55,6 +56,8 @@ struct wm_adsp {
 	bool running;
 
 	struct regulator *dvfs;
+
+	struct wm_coeff *wm_coeff;
 };
 
 #define WM_ADSP1(wname, num) \