fbdev: aty128fb: 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: Helge Deller <[e-mail]>
Reviewed-by: Jani Nikula <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/video/fbdev/aty/aty128fb.c

···
 		reg &= ~LVDS_DISPLAY_DIS;
 		aty_st_le32(LVDS_GEN_CNTL, reg);
 #ifdef CONFIG_FB_ATY128_BACKLIGHT
-		aty128_bl_set_power(info, FB_BLANK_UNBLANK);
+		aty128_bl_set_power(info, BACKLIGHT_POWER_ON);
 #endif
 	} else {
 #ifdef CONFIG_FB_ATY128_BACKLIGHT
-		aty128_bl_set_power(info, FB_BLANK_POWERDOWN);
+		aty128_bl_set_power(info, BACKLIGHT_POWER_OFF);
 #endif
 		reg = aty_ld_le32(LVDS_GEN_CNTL);
 		reg |= LVDS_DISPLAY_DIS;
···
 		219 * FB_BACKLIGHT_MAX / MAX_LEVEL);
 
 	bd->props.brightness = bd->props.max_brightness;
-	bd->props.power = FB_BLANK_UNBLANK;
+	bd->props.power = BACKLIGHT_POWER_ON;
 	backlight_update_status(bd);
 
 	printk("aty128: Backlight initialized (%s)\n", name);