ASoC: Staticise twl6040_hs_jack_report()

It's an internal function so shouldn't be exported (as sparse points
out).
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

sound/soc/codecs/twl6040.c

@@ -724,8 +724,8 @@ static int twl6040_power_mode_event(struct snd_soc_dapm_widget *w,
 	return 0;
 }
 
-void twl6040_hs_jack_report(struct snd_soc_codec *codec,
-				struct snd_soc_jack *jack, int report)
+static void twl6040_hs_jack_report(struct snd_soc_codec *codec,
+				   struct snd_soc_jack *jack, int report)
 {
 	struct twl6040_data *priv = snd_soc_codec_get_drvdata(codec);
 	int status;