dm: sound: Start i2c IDs from 0

The current ID enums start from 1 but there does not seem to be any reason
that they cannot start with 0. Adjust the code to avoid the +1 in
codec_init().

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/sound/max98095.h b/drivers/sound/max98095.h
index 44b1e3a..13ae177 100644
--- a/drivers/sound/max98095.h
+++ b/drivers/sound/max98095.h
@@ -13,7 +13,7 @@
 
 /*  Available audio interface ports in wm8994 codec */
 enum en_max_audio_interface {
-	AIF1 = 1,
+	AIF1,
 	AIF2,
 };