parport: ax88796: Improve a size determination in parport_ax88796_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: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/parport/parport_ax88796.c

@@ -280,7 +280,7 @@ static int parport_ax88796_probe(struct platform_device *pdev)
 	int irq;
 	int ret;
 
-	dd = kzalloc(sizeof(struct ax_drvdata), GFP_KERNEL);
+	dd = kzalloc(sizeof(*dd), GFP_KERNEL);
 	if (!dd)
 		return -ENOMEM;