video: fbdev: sunxvr500: 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.

File size before:
   text	   data	    bss	    dec	    hex	filename
    170	    488	      0	    658	    292	drivers/video/fbdev/sunxvr500.o

File size after adding 'const':
   text	   data	    bss	    dec	    hex	filename
    394	    264	      0	    658	    292	drivers/video/fbdev/sunxvr500.o
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/sunxvr500.c

@@ -393,7 +393,7 @@ static int e3d_pci_register(struct pci_dev *pdev,
 	return err;
 }
 
-static struct pci_device_id e3d_pci_table[] = {
+static const struct pci_device_id e3d_pci_table[] = {
 	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x7a0),	},
 	{	PCI_DEVICE(0x1091, 0x7a0),			},
 	{	PCI_DEVICE(PCI_VENDOR_ID_3DLABS, 0x7a2),	},