video: s3c-fb: Improve a size determination in s3c_fb_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>
Acked-by: Jingoo Han <jingoohan1@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

drivers/video/fbdev/s3c-fb.c

@@ -1383,7 +1383,7 @@ static int s3c_fb_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	sfb = devm_kzalloc(dev, sizeof(struct s3c_fb), GFP_KERNEL);
+	sfb = devm_kzalloc(dev, sizeof(*sfb), GFP_KERNEL);
 	if (!sfb)
 		return -ENOMEM;