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 <[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/pandora_bl.c

···
 #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>
···
 	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;