V4L/DVB (7881): saa7134: fixed a compile warning in saa7134-core.c

patch 779169257208 made the variable mask unnecessary.
This patch just removes the declaration.
Signed-off-by: NHartmut Hackmann <hartmut.hackmann@t-online.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/saa7134/saa7134-core.c

@@ -864,7 +864,6 @@ static int __devinit saa7134_initdev(struct pci_dev *pci_dev,
 	struct saa7134_dev *dev;
 	struct saa7134_mpeg_ops *mops;
 	int err;
-	int mask;
 
 	if (saa7134_devcount == SAA7134_MAXBOARDS)
 		return -ENOMEM;