sparc: Annotate of_device_id arrays with const or __initdata.

As suggested by Stephen Rothwell.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/serial/sunsu.c b/drivers/serial/sunsu.c
index a378464..a4dc79b1 100644
--- a/drivers/serial/sunsu.c
+++ b/drivers/serial/sunsu.c
@@ -1506,7 +1506,7 @@
 	return 0;
 }
 
-static struct of_device_id su_match[] = {
+static const struct of_device_id su_match[] = {
 	{
 		.name = "su",
 	},