clk: add "const" for clk_ops of basic clks

The clk_ops of basic clks should have "const" to match the definition
in "struct clk" and clk_register prototype.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
diff --git a/drivers/clk/clk-fixed-rate.c b/drivers/clk/clk-fixed-rate.c
index 651b06f..027e477 100644
--- a/drivers/clk/clk-fixed-rate.c
+++ b/drivers/clk/clk-fixed-rate.c
@@ -33,7 +33,7 @@
 	return to_clk_fixed_rate(hw)->fixed_rate;
 }
 
-struct clk_ops clk_fixed_rate_ops = {
+const struct clk_ops clk_fixed_rate_ops = {
 	.recalc_rate = clk_fixed_rate_recalc_rate,
 };
 EXPORT_SYMBOL_GPL(clk_fixed_rate_ops);