can: constify of_device_id array

of_device_id is always used as const.
(See driver.of_match_table and open firmware functions)

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/can/mscan/mpc5xxx_can.c

@@ -43,7 +43,7 @@ struct mpc5xxx_can_data {
 };
 
 #ifdef CONFIG_PPC_MPC52xx
-static struct of_device_id mpc52xx_cdm_ids[] = {
+static const struct of_device_id mpc52xx_cdm_ids[] = {
 	{ .compatible = "fsl,mpc5200-cdm", },
 	{}
 };