i2c: constify platform_device_id

The platform_device_id is not modified by these drivers and core uses it
as const.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
index a53a7dd..785aa67 100644
--- a/drivers/i2c/busses/i2c-imx.c
+++ b/drivers/i2c/busses/i2c-imx.c
@@ -241,7 +241,7 @@
 
 };
 
-static struct platform_device_id imx_i2c_devtype[] = {
+static const struct platform_device_id imx_i2c_devtype[] = {
 	{
 		.name = "imx1-i2c",
 		.driver_data = (kernel_ulong_t)&imx1_i2c_hwdata,