backlight: sky81452-backlight: Use backlight power constants

Replace FB_BLANK_ constants with their counterparts from the
backlight subsystem. The values are identical, so there's no
change in functionality.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Link: https://lore.kernel.org/r/20240624152033.25016-18-tzimmermann@suse.deSigned-off-by: Lee Jones <lee@kernel.org>

drivers/video/backlight/sky81452-backlight.c

@@ -315,7 +315,7 @@ static void sky81452_bl_remove(struct platform_device *pdev)
 
 	sysfs_remove_group(&bd->dev.kobj, &sky81452_bl_attr_group);
 
-	bd->props.power = FB_BLANK_UNBLANK;
+	bd->props.power = BACKLIGHT_POWER_ON;
 	bd->props.brightness = 0;
 	backlight_update_status(bd);