backlight: pandora-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/20240624152033.25016-14-tzimmermann@suse.deSigned-off-by: Lee Jones <lee@kernel.org>

drivers/video/backlight/pandora_bl.c

@@ -11,7 +11,6 @@
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
 #include <linux/delay.h>
-#include <linux/fb.h>
 #include <linux/backlight.h>
 #include <linux/mfd/twl.h>
 #include <linux/err.h>
@@ -43,7 +42,7 @@ static int pandora_backlight_update_status(struct backlight_device *bl)
 	struct pandora_private *priv = bl_get_data(bl);
 	u8 r;
 
-	if (bl->props.power != FB_BLANK_UNBLANK)
+	if (bl->props.power != BACKLIGHT_POWER_ON)
 		brightness = 0;
 	if (bl->props.state & BL_CORE_FBBLANK)
 		brightness = 0;