clk: at91: fix pmc_clk_ids data type attriubte

Fix pmc_clk_ids data type attribute (__initdata -> __initconst).

Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com>
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

drivers/clk/at91/pmc.c

@@ -228,7 +228,7 @@ out_free_pmc:
 	return NULL;
 }
 
-static const struct of_device_id pmc_clk_ids[] __initdata = {
+static const struct of_device_id pmc_clk_ids[] __initconst = {
 	/* Main clock */
 	{
 		.compatible = "atmel,at91rm9200-clk-main",