media: cx25821: request_irq -> devm_request_irq

Fixes smatch warning:

drivers/media/pci/cx25821/cx25821-alsa.c:768 cx25821_audio_initdev() warn: 'dev->pci->irq' from request_irq() not released on lines: 768.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/pci/cx25821/cx25821-alsa.c

@@ -728,7 +728,7 @@ static int cx25821_audio_initdev(struct cx25821_dev *dev)
 
 	chip->irq = dev->pci->irq;
 
-	err = request_irq(dev->pci->irq, cx25821_irq,
+	err = devm_request_irq(&dev->pci->dev, dev->pci->irq, cx25821_irq,
 			       IRQF_SHARED, chip->dev->name, chip);
 
 	if (err < 0) {