ARM: SAMSUNG: Add __init attribute to samsung_bl_set()

s3c_set_platdata() is defined with __init attribute, hence all functions
referencing this function should also be defined with __init attribute.

samsung_bl_set() is referenced only in '__init xxx_machine_init()' functions,
thus this change won't put any additional constraint on the usage of
samsung_bl_set().

Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/plat-samsung/dev-backlight.c

@@ -77,7 +77,7 @@ static struct platform_device samsung_dfl_bl_device __initdata = {
  * @gpio_info:	structure containing GPIO info for PWM timer
  * @bl_data:	structure containing Backlight control data
  */
-void samsung_bl_set(struct samsung_bl_gpio_info *gpio_info,
+void __init samsung_bl_set(struct samsung_bl_gpio_info *gpio_info,
 	struct platform_pwm_backlight_data *bl_data)
 {
 	int ret = 0;