ARM: pxa: Improve a size determination in pxa3xx_u2d_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.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>

arch/arm/mach-pxa/pxa3xx-ulpi.c

@@ -286,7 +286,7 @@ static int pxa3xx_u2d_probe(struct platform_device *pdev)
 	struct resource *r;
 	int err;
 
-	u2d = kzalloc(sizeof(struct pxa3xx_u2d_ulpi), GFP_KERNEL);
+	u2d = kzalloc(sizeof(*u2d), GFP_KERNEL);
 	if (!u2d) {
 		dev_err(&pdev->dev, "failed to allocate memory\n");
 		return -ENOMEM;