video: fbdev: skeletonfb: 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>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Antonino Daplas <adaplas@gmail.com>
Cc: Maik Broemme <mbroemme@libmpq.org>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

drivers/video/fbdev/skeletonfb.c

@@ -866,7 +866,7 @@ static int xxxfb_resume(struct pci_dev *dev)
 #define xxxfb_resume NULL
 #endif /* CONFIG_PM */
 
-static struct pci_device_id xxxfb_id_table[] = {
+static const struct pci_device_id xxxfb_id_table[] = {
 	{ PCI_VENDOR_ID_XXX, PCI_DEVICE_ID_XXX,
 	  PCI_ANY_ID, PCI_ANY_ID, PCI_BASE_CLASS_DISPLAY << 16,
 	  PCI_CLASS_MASK, 0 },