backlight: rave-sp-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/rave-sp-backlight.c

···
 {
 	const struct backlight_properties *p = &bd->props;
 	const u8 intensity =
-		(p->power == FB_BLANK_UNBLANK) ? p->brightness : 0;
+		(p->power == BACKLIGHT_POWER_ON) ? p->brightness : 0;
 	struct rave_sp *sp = dev_get_drvdata(&bd->dev);
 	u8 cmd[] = {
 		[0] = RAVE_SP_CMD_SET_BACKLIGHT,