backlight: otm3225a: Use lcd power constants

Replace FB_BLANK_ constants with their counterparts from the
lcd 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/otm3225a.c

···
 	if (power == dd->power)
 		return 0;
 
-	if (power > FB_BLANK_UNBLANK)
+	if (power > LCD_POWER_ON)
 		otm3225a_write(dd->spi, display_off, ARRAY_SIZE(display_off));
 	else
 		otm3225a_write(dd->spi, display_on, ARRAY_SIZE(display_on));