backlight: ktd253-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 <[e-mail]>
Reviewed-by: Daniel Thompson <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Lee Jones <[e-mail]>

drivers/video/backlight/ktd253-backlight.c

···
 #include <linux/backlight.h>
 #include <linux/delay.h>
 #include <linux/err.h>
-#include <linux/fb.h>
 #include <linux/gpio/consumer.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
···
 	/* When we just enable the GPIO line we set max brightness */
 	if (brightness) {
 		bl->props.brightness = brightness;
-		bl->props.power = FB_BLANK_UNBLANK;
+		bl->props.power = BACKLIGHT_POWER_ON;
 	} else {
 		bl->props.brightness = 0;
-		bl->props.power = FB_BLANK_POWERDOWN;
+		bl->props.power = BACKLIGHT_POWER_OFF;
 	}
 
 	ktd253->bl = bl;