ASoC: rt298: fix wrong setting of gpio2_en

The register value to enable gpio2 was incorrect. So fix it.

Signed-off-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/sound/soc/codecs/rt298.c b/sound/soc/codecs/rt298.c
index d3e30a6..f823eb5 100644
--- a/sound/soc/codecs/rt298.c
+++ b/sound/soc/codecs/rt298.c
@@ -1214,7 +1214,7 @@
 	mdelay(10);
 
 	if (!rt298->pdata.gpio2_en)
-		regmap_write(rt298->regmap, RT298_SET_DMIC2_DEFAULT, 0x4000);
+		regmap_write(rt298->regmap, RT298_SET_DMIC2_DEFAULT, 0x40);
 	else
 		regmap_write(rt298->regmap, RT298_SET_DMIC2_DEFAULT, 0);