uwb: make USB device id table constant

The id_table field of the struct usb_device_id is constant in <linux/usb.h>
so it is worth to make the initialization data also constant.

Signed-off-by: Márton Németh <nm127@freemail.hu>
Signed-off-by: David Vrabel <david.vrabel@csr.com>
diff --git a/drivers/uwb/i1480/dfu/usb.c b/drivers/uwb/i1480/dfu/usb.c
index 0bb665a..08f9a7b 100644
--- a/drivers/uwb/i1480/dfu/usb.c
+++ b/drivers/uwb/i1480/dfu/usb.c
@@ -430,7 +430,7 @@
 
 
 /** USB device ID's that we handle */
-static struct usb_device_id i1480_usb_id_table[] = {
+static const struct usb_device_id i1480_usb_id_table[] = {
 	i1480_USB_DEV(0x8086, 0xdf3b),
 	i1480_USB_DEV(0x15a9, 0x0005),
 	i1480_USB_DEV(0x07d1, 0x3802),