ASoC: tas2552: Remove unneeded semicolon

Double semicolon was added by the following commit:
ea178d1456dc ASoC: tas2552: Make the enable-gpio really optional

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/sound/soc/codecs/tas2552.c b/sound/soc/codecs/tas2552.c
index 7e65294..534b57b 100644
--- a/sound/soc/codecs/tas2552.c
+++ b/sound/soc/codecs/tas2552.c
@@ -708,7 +708,7 @@
 		if (PTR_ERR(data->enable_gpio) == -EPROBE_DEFER)
 			return -EPROBE_DEFER;
 
-		data->enable_gpio = NULL;;
+		data->enable_gpio = NULL;
 	}
 
 	data->tas2552_client = client;