serial:imx make of_device_id array const

Make of_device_id array const.

Signed-off-by: Sanjeev Sharma <Sanjeev_Sharma@mentor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 0eb29b1..412bfbf 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -273,7 +273,7 @@
 };
 MODULE_DEVICE_TABLE(platform, imx_uart_devtype);
 
-static struct of_device_id imx_uart_dt_ids[] = {
+static const struct of_device_id imx_uart_dt_ids[] = {
 	{ .compatible = "fsl,imx6q-uart", .data = &imx_uart_devdata[IMX6Q_UART], },
 	{ .compatible = "fsl,imx1-uart", .data = &imx_uart_devdata[IMX1_UART], },
 	{ .compatible = "fsl,imx21-uart", .data = &imx_uart_devdata[IMX21_UART], },