Input: hampshire - constify serio_device_id

serio_device_id are not supposed to change at runtime. All functions
working with serio_device_id provided by <linux/serio.h> work with
const serio_device_id. So mark the non-const structs as const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
diff --git a/drivers/input/touchscreen/hampshire.c b/drivers/input/touchscreen/hampshire.c
index ecb1e0e..eb052d5 100644
--- a/drivers/input/touchscreen/hampshire.c
+++ b/drivers/input/touchscreen/hampshire.c
@@ -163,7 +163,7 @@
  * The serio driver structure.
  */
 
-static struct serio_device_id hampshire_serio_ids[] = {
+static const struct serio_device_id hampshire_serio_ids[] = {
 	{
 		.type	= SERIO_RS232,
 		.proto	= SERIO_HAMPSHIRE,