dm: sound: Rename en_sound_codec to sound_codec

The en_ prefix is confusing and not needed. Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/sound.h b/include/sound.h
index 77bfe6a..149e12d 100644
--- a/include/sound.h
+++ b/include/sound.h
@@ -8,7 +8,7 @@
 #define __SOUND_H__
 
 /* sound codec enum */
-enum en_sound_codec {
+enum sound_codec {
 	CODEC_WM_8994,
 	CODEC_WM_8995,
 	CODEC_MAX_98095,
@@ -25,7 +25,7 @@
 struct sound_codec_info {
 	int i2c_bus;
 	int i2c_dev_addr;
-	enum en_sound_codec codec_type;
+	enum sound_codec codec_type;
 };
 
 /*