[media] saa7134: Remove some casting warnings

drivers/media/pci/saa7134/saa7134-go7007.c:247:17: warning: incorrect type in argument 1 (different base types)
drivers/media/pci/saa7134/saa7134-go7007.c:247:17:    expected unsigned int [unsigned] val
drivers/media/pci/saa7134/saa7134-go7007.c:247:17:    got restricted __le32 [usertype] <noident>
drivers/media/pci/saa7134/saa7134-go7007.c:252:17: warning: incorrect type in argument 1 (different base types)
drivers/media/pci/saa7134/saa7134-go7007.c:252:17:    expected unsigned int [unsigned] val
drivers/media/pci/saa7134/saa7134-go7007.c:252:17:    got restricted __le32 [usertype] <noident>
drivers/media/pci/saa7134/saa7134-go7007.c:299:9: warning: incorrect type in argument 1 (different base types)
drivers/media/pci/saa7134/saa7134-go7007.c:299:9:    expected unsigned int [unsigned] val
drivers/media/pci/saa7134/saa7134-go7007.c:299:9:    got restricted __le32 [usertype] <noident>
drivers/media/pci/saa7134/saa7134-go7007.c:300:9: warning: incorrect type in argument 1 (different base types)
drivers/media/pci/saa7134/saa7134-go7007.c:300:9:    expected unsigned int [unsigned] val
drivers/media/pci/saa7134/saa7134-go7007.c:300:9:    got restricted __le32 [usertype] <noident>

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>