net: phy: at803x: remove extra space after cast

Remove extra space after cast as reported by checkpatch to keep code
clean.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20231217232739.27065-1-ansuelsmth@gmail.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/phy/at803x.c

@@ -462,7 +462,7 @@ static int at803x_set_wol(struct phy_device *phydev,
 		if (!ndev)
 			return -ENODEV;
 
-		mac = (const u8 *) ndev->dev_addr;
+		mac = (const u8 *)ndev->dev_addr;
 
 		if (!is_valid_ether_addr(mac))
 			return -EINVAL;