net: phy: at803x: fix coccinelle warnings

drivers/net/phy/at803x.c:196:26-32: ERROR: application of sizeof to pointer

sizeof when applied to a pointer typed expression gives the size of
the pointer

Generated by: scripts/coccinelle/misc/noderef.cocci

Signed-off-by: Fengguang Wu <[e-mail]>
Acked-by: Daniel Mack <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/net/phy/at803x.c

···
 	struct device *dev = &phydev->dev;
 	struct at803x_priv *priv;
 
-	priv = devm_kzalloc(dev, sizeof(priv), GFP_KERNEL);
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;