staging: rts5208: rtsx.c: Fix invalid use of sizeof in rtsx_probe()

sizeof() when applied to a pointer typed expression gives the
size of the pointer, not that of the pointed data.

Fixes: 2eb9d8cbb3c3 ("staging: rts5208: rtsx.c: Alloc sizeof struct")
Signed-off-by: Wei Yongjun <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/rts5208/rtsx.c

···
 	dev = host_to_rtsx(host);
 	memset(dev, 0, sizeof(struct rtsx_dev));
 
-	dev->chip = kzalloc(sizeof(dev->chip), GFP_KERNEL);
+	dev->chip = kzalloc(sizeof(*dev->chip), GFP_KERNEL);
 	if (!dev->chip) {
 		err = -ENOMEM;
 		goto errout;