HID: macally: Constify macally_id_table

macally_id_table is not modified and can be made const to allow the
compiler to put it in read-only memory.
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/hid-macally.c

@@ -29,7 +29,7 @@ static __u8 *macally_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 	return rdesc;
 }
 
-static struct hid_device_id macally_id_table[] = {
+static const struct hid_device_id macally_id_table[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SOLID_YEAR,
 			 USB_DEVICE_ID_MACALLY_IKEY_KEYBOARD) },
 	{ }