backlight: gpio-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: Linus Walleij <[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/gpio_backlight.c

···
 
 #include <linux/backlight.h>
 #include <linux/err.h>
-#include <linux/fb.h>
 #include <linux/gpio/consumer.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
···
 	/* Set the initial power state */
 	if (!of_node || !of_node->phandle)
 		/* Not booted with device tree or no phandle link to the node */
-		bl->props.power = def_value ? FB_BLANK_UNBLANK
-					    : FB_BLANK_POWERDOWN;
+		bl->props.power = def_value ? BACKLIGHT_POWER_ON
+					    : BACKLIGHT_POWER_OFF;
 	else if (gpiod_get_value_cansleep(gbl->gpiod) == 0)
-		bl->props.power = FB_BLANK_POWERDOWN;
+		bl->props.power = BACKLIGHT_POWER_OFF;
 	else
-		bl->props.power = FB_BLANK_UNBLANK;
+		bl->props.power = BACKLIGHT_POWER_ON;
 
 	bl->props.brightness = 1;