media: cobalt: 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: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/pci/cobalt/cobalt-driver.c

@@ -36,7 +36,7 @@
 #include "cobalt-omnitek.h"
 
 /* add your revision and whatnot here */
-static struct pci_device_id cobalt_pci_tbl[] = {
+static const struct pci_device_id cobalt_pci_tbl[] = {
 	{PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_COBALT,
 	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 	{0,}