ASoC: ak4642: code clean up

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/ak4642.c

@@ -448,7 +448,7 @@ static __devinit int ak4642_i2c_probe(struct i2c_client *i2c,
 	int ret;
 
 	ak4642 = kzalloc(sizeof(struct ak4642_priv), GFP_KERNEL);
-	if (ak4642 == NULL)
+	if (!ak4642)
 		return -ENOMEM;
 
 	i2c_set_clientdata(i2c, ak4642);