ASoC: Add WM8958 enhanced EQ support

DSP2 in the WM8958 can be used to support an upgraded EQ for use in
demanding applications.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@ti.com>
diff --git a/sound/soc/codecs/wm8994.h b/sound/soc/codecs/wm8994.h
index f337f3d..0a1db04 100644
--- a/sound/soc/codecs/wm8994.h
+++ b/sound/soc/codecs/wm8994.h
@@ -87,6 +87,7 @@
 	int hpf1_ena[3];
 	int hpf2_ena[3];
 	int vss_ena[3];
+	int enh_eq_ena[3];
 
 	/* Platform dependant DRC configuration */
 	const char **drc_texts;
@@ -114,6 +115,11 @@
 	const char **vss_hpf_texts;
 	struct soc_enum vss_hpf_enum;
 
+	/* Platform dependant enhanced EQ configuration */
+	int enh_eq_cfg;
+	const char **enh_eq_texts;
+	struct soc_enum enh_eq_enum;
+
 	struct wm8994_micdet micdet[2];
 
 	wm8958_micdet_cb jack_cb;
@@ -133,6 +139,7 @@
 	const struct firmware *cur_fw;
 	const struct firmware *mbc;
 	const struct firmware *mbc_vss;
+	const struct firmware *enh_eq;
 };
 
 #endif