Input: xilinx_ps2 - make Open Firmware device ids constant

The match_table field of the struct of_device_id is constant
in <linux/of_platform.h> so it makes sense to mark xps2_of_match
also constant.

Signed-off-by: Márton Németh <nm127@freemail.hu>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/serio/xilinx_ps2.c b/drivers/input/serio/xilinx_ps2.c
index ebb22f8..78c64fb 100644
--- a/drivers/input/serio/xilinx_ps2.c
+++ b/drivers/input/serio/xilinx_ps2.c
@@ -354,7 +354,7 @@
 }
 
 /* Match table for of_platform binding */
-static struct of_device_id xps2_of_match[] __devinitdata = {
+static const struct of_device_id xps2_of_match[] __devinitconst = {
 	{ .compatible = "xlnx,xps-ps2-1.00.a", },
 	{ /* end of list */ },
 };