clk: make clk_init_data const

Make these const as they are only stored in the init field of a clk_hw
structure, which is const.

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

drivers/clk/sirf/clk-prima2.c

@@ -42,7 +42,7 @@ static struct clk_dmn clk_mmc45 = {
 	},
 };
 
-static struct clk_init_data clk_nand_init = {
+static const struct clk_init_data clk_nand_init = {
 	.name = "nand",
 	.ops = &ios_ops,
 	.parent_names = std_clk_io_parents,