ASoC: rt-sdw-common: Enhance switch case to prevent uninitialized variable

If det_mode is not 0, 3 or 5 then function will return
jack_type with an uninitialzed value.
Enhance switch case to prevent uninitialized variable issue.

Signed-off-by: Jack Yu <jack.yu@realtek.com>
Link: https://patch.msgid.link/8631337239d744088d56caab2d8f39cb@realtek.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt-sdw-common.c

@@ -150,15 +150,15 @@ int rt_sdca_headset_detect(struct regmap *map, unsigned int entity_id)
 		goto io_error;
 
 	switch (det_mode) {
-	case 0x00:
-		jack_type = 0;
-		break;
 	case 0x03:
 		jack_type = SND_JACK_HEADPHONE;
 		break;
 	case 0x05:
 		jack_type = SND_JACK_HEADSET;
 		break;
+	default:
+		jack_type = 0;
+		break;
 	}
 
 	/* write selected_mode */