clk: constify of_device_id array

of_device_id is always used as const.
(See driver.of_match_table and open firmware functions)

__initdata updated to __initconst for
static const struct of_device_id ti_clkdm_match_table[]

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
diff --git a/drivers/clk/ti/clk-dra7-atl.c b/drivers/clk/ti/clk-dra7-atl.c
index 59bb4b3..d86bc46 100644
--- a/drivers/clk/ti/clk-dra7-atl.c
+++ b/drivers/clk/ti/clk-dra7-atl.c
@@ -294,7 +294,7 @@
 	return 0;
 }
 
-static struct of_device_id of_dra7_atl_clk_match_tbl[] = {
+static const struct of_device_id of_dra7_atl_clk_match_tbl[] = {
 	{ .compatible = "ti,dra7-atl", },
 	{},
 };