ASoC: wm2000: Improve a size determination in wm2000_i2c_probe()

Replace the specification of a data structure by a pointer dereference
as the parameter for the operator "sizeof" to make the corresponding size
determination a bit safer according to the Linux coding style convention.

This issue was detected by using the Coccinelle software.
Signed-off-by: NMarkus Elfring <elfring@users.sourceforge.net>
Acked-by: NCharles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

sound/soc/codecs/wm2000.c

@@ -826,8 +826,7 @@ static int wm2000_i2c_probe(struct i2c_client *i2c,
 	int reg;
 	u16 id;
 
-	wm2000 = devm_kzalloc(&i2c->dev, sizeof(struct wm2000_priv),
-			      GFP_KERNEL);
+	wm2000 = devm_kzalloc(&i2c->dev, sizeof(*wm2000), GFP_KERNEL);
 	if (!wm2000)
 		return -ENOMEM;