media: bt8xx: bttv: constify pci_device_id

pci_device_id are not supposed to change at runtime. All functions
working with pci_device_id provided by <linux/pci.h> work with
const pci_device_id. So mark the non-const structs as const.
Signed-off-by: NArvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/pci/bt8xx/bttv-driver.c

@@ -4388,7 +4388,7 @@ static int bttv_resume(struct pci_dev *pci_dev)
 }
 #endif
 
-static struct pci_device_id bttv_pci_tbl[] = {
+static const struct pci_device_id bttv_pci_tbl[] = {
 	{PCI_VDEVICE(BROOKTREE, PCI_DEVICE_ID_BT848), 0},
 	{PCI_VDEVICE(BROOKTREE, PCI_DEVICE_ID_BT849), 0},
 	{PCI_VDEVICE(BROOKTREE, PCI_DEVICE_ID_BT878), 0},