media: saa7164: remove redundant assignment to variable idx

Variable idx is being assigned a value that is never read, it is being
re-assigned a new value in the following for-loop. The assignment is
redundant and can be removed.
Signed-off-by: NColin Ian King <colin.i.king@gmail.com>
Signed-off-by: NHans Verkuil <hverkuil-cisco@xs4all.nl>

drivers/media/pci/saa7164/saa7164-cmd.c

@@ -187,7 +187,6 @@ static int saa7164_cmd_set(struct saa7164_dev *dev, struct tmComResInfo *msg,
 	mutex_lock(&dev->cmds[msg->id].lock);
 
 	size = msg->size;
-	idx = 0;
 	cmds = size / bus->m_wMaxReqSize;
 	if (size % bus->m_wMaxReqSize == 0)
 		cmds -= 1;