[media] saa7164: make buffer smaller

This isn't a runtime bug, it's just to make static checkers happy.

In vidioc_querycap() we copy a saa7164_dev ->name driver array into a
v4l2_capability -> driver array.  The ->driver array is only 16 chars
long so ->name also can't be more than 16 characters.

The ->name gets set in v4l2_capability() and it always is less than 16
characters so we can easily make the buffer smaller.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/saa7164/saa7164-core.c

@@ -1001,7 +1001,7 @@ static int saa7164_dev_setup(struct saa7164_dev *dev)
 	atomic_inc(&dev->refcount);
 	dev->nr = saa7164_devcount++;
 
-	sprintf(dev->name, "saa7164[%d]", dev->nr);
+	snprintf(dev->name, sizeof(dev->name), "saa7164[%d]", dev->nr);
 
 	mutex_lock(&devlist);
 	list_add_tail(&dev->devlist, &saa7164_devlist);

drivers/media/video/saa7164/saa7164.h

@@ -447,7 +447,7 @@ struct saa7164_dev {
 	int	nr;
 	int	hwrevision;
 	u32	board;
-	char	name[32];
+	char	name[16];
 
 	/* firmware status */
 	struct saa7164_fw_status	fw_status;