[media] cx25821-alsa.c: Add braces to else clause

Add curly braces around else clause because corresponding if has them.
Signed-off-by: NLeonid V. Fedorenchik <leonidsbox@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

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

@@ -317,8 +317,9 @@ static irqreturn_t cx25821_irq(int irq, void *dev_id)
 				cx25821_aud_irq(chip, audint_status,
 						audint_mask);
 				break;
-			} else
+			} else {
 				goto out;
+			}
 		}
 
 		handled = 1;