drm/panel: panel-samsung-s6e63j0x03: 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 or semantics.

Signed-off-by: Thomas Zimmermann <[e-mail]>
Cc: Neil Armstrong <[e-mail]>
Cc: Jessica Zhang <[e-mail]>
Reviewed-by: Jessica Zhang <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/panel/panel-samsung-s6e63j0x03.c

···
 	if (ret < 0)
 		return ret;
 
-	ctx->bl_dev->props.power = FB_BLANK_NORMAL;
+	ctx->bl_dev->props.power = BACKLIGHT_POWER_REDUCED;
 
 	ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
 	if (ret < 0)
···
 	if (ret < 0)
 		return ret;
 
-	ctx->bl_dev->props.power = FB_BLANK_POWERDOWN;
+	ctx->bl_dev->props.power = BACKLIGHT_POWER_OFF;
 
 	return 0;
 }
···
 	if (ret < 0)
 		goto err;
 
-	ctx->bl_dev->props.power = FB_BLANK_NORMAL;
+	ctx->bl_dev->props.power = BACKLIGHT_POWER_REDUCED;
 
 	return 0;
 
···
 	if (ret < 0)
 		return ret;
 
-	ctx->bl_dev->props.power = FB_BLANK_UNBLANK;
+	ctx->bl_dev->props.power = BACKLIGHT_POWER_ON;
 
 	return 0;
 }
···
 
 	ctx->bl_dev->props.max_brightness = MAX_BRIGHTNESS;
 	ctx->bl_dev->props.brightness = DEFAULT_BRIGHTNESS;
-	ctx->bl_dev->props.power = FB_BLANK_POWERDOWN;
+	ctx->bl_dev->props.power = BACKLIGHT_POWER_OFF;
 
 	drm_panel_add(&ctx->panel);