[media] saa6588: add support for non-blocking mode

saa6588 always blocked while waiting for data, even if the filehandle
was in non-blocking mode.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/pci/bt8xx/bttv-driver.c

@@ -3266,7 +3266,9 @@ static ssize_t radio_read(struct file *file, char __user *data,
 	struct bttv_fh *fh = file->private_data;
 	struct bttv *btv = fh->btv;
 	struct saa6588_command cmd;
-	cmd.block_count = count/3;
+
+	cmd.block_count = count / 3;
+	cmd.nonblocking = file->f_flags & O_NONBLOCK;
 	cmd.buffer = data;
 	cmd.instance = file;
 	cmd.result = -ENODEV;