ASoC: Use snd_soc_info_enum_double() for SOC_ENUM_EXT controls

snd_soc_info_enum_ext() and snd_soc_info_enum_double() are almost identical. The
only difference is that snd_soc_info_enum_double() is also able to handle stereo
controls. Using snd_soc_info_enum double() instead of snd_soc_info_enum_ext()
for the SOC_ENUM_EXT control's info callback allows us to remove
snd_soc_info_enum_ext().

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/include/sound/soc.h b/include/sound/soc.h
index 724a42a..6f86a41 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -234,7 +234,7 @@
 	.private_value = xdata }
 #define SOC_ENUM_EXT(xname, xenum, xhandler_get, xhandler_put) \
 {	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
-	.info = snd_soc_info_enum_ext, \
+	.info = snd_soc_info_enum_double, \
 	.get = xhandler_get, .put = xhandler_put, \
 	.private_value = (unsigned long)&xenum }
 
@@ -485,8 +485,6 @@
 	const struct snd_kcontrol_new *controls, int num_controls);
 int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
 	struct snd_ctl_elem_info *uinfo);
-int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
-	struct snd_ctl_elem_info *uinfo);
 int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
 	struct snd_ctl_elem_value *ucontrol);
 int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,