ARM: SAMSUNG: Add a callback 'notify_after' for PWM backlight control

The callback 'notify_after' was added to struct platform_pwm_backlight_data
provided by PWM backlight driver. Therefore, this patch adds a callback
'notify_after' which can be called after pwm_enable, pwm_disable and
pwm_config.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

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

@@ -115,6 +115,8 @@ void samsung_bl_set(struct samsung_bl_gpio_info *gpio_info,
 		samsung_bl_data->init = bl_data->init;
 	if (bl_data->notify)
 		samsung_bl_data->notify = bl_data->notify;
+	if (bl_data->notify_after)
+		samsung_bl_data->notify_after = bl_data->notify_after;
 	if (bl_data->exit)
 		samsung_bl_data->exit = bl_data->exit;
 	if (bl_data->check_fb)