clk: imx: make clk_ops const

Make these const as they are only stored in the const field of a
clk_init_data structure.

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
diff --git a/drivers/clk/imx/clk-pllv2.c b/drivers/clk/imx/clk-pllv2.c
index 4aeda56..c845b8c 100644
--- a/drivers/clk/imx/clk-pllv2.c
+++ b/drivers/clk/imx/clk-pllv2.c
@@ -226,7 +226,7 @@ static void clk_pllv2_unprepare(struct clk_hw *hw)
 	__raw_writel(reg, pllbase + MXC_PLL_DP_CTL);
 }
 
-static struct clk_ops clk_pllv2_ops = {
+static const struct clk_ops clk_pllv2_ops = {
 	.prepare = clk_pllv2_prepare,
 	.unprepare = clk_pllv2_unprepare,
 	.recalc_rate = clk_pllv2_recalc_rate,