ASoC: Report an error for unknown adav80x formats

Not only fixes error handling but also some uninitialized variable
warnings.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
diff --git a/sound/soc/codecs/adav80x.c b/sound/soc/codecs/adav80x.c
index e30fba6..300c04b 100644
--- a/sound/soc/codecs/adav80x.c
+++ b/sound/soc/codecs/adav80x.c
@@ -456,7 +456,7 @@
 		val = ADAV80X_CAPTURE_WORD_LEN24;
 		break;
 	default:
-		break;
+		return -EINVAL;
 	}
 
 	snd_soc_update_bits(codec, adav80x_port_ctrl_regs[dai->id][0],
@@ -488,7 +488,7 @@
 		val = ADAV80X_PLAYBACK_MODE_RIGHT_J_24;
 		break;
 	default:
-		break;
+		return -EINVAL;
 	}
 
 	snd_soc_update_bits(codec, adav80x_port_ctrl_regs[dai->id][1],