backlight: Fix nvidia backlight initial brightness

Fix a mix up when the nvidia driver was converted resulting
in the backlight having an incorrect initial brightness.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>

drivers/video/nvidia/nv_backlight.c

@@ -23,8 +23,6 @@
 #define MAX_LEVEL 0x534
 #define LEVEL_STEP ((MAX_LEVEL - MIN_LEVEL) / FB_BACKLIGHT_MAX)
 
-static struct backlight_properties nvidia_bl_data;
-
 static int nvidia_bl_get_level_brightness(struct nvidia_par *par,
 		int level)
 {
@@ -119,7 +117,7 @@ void nvidia_bl_init(struct nvidia_par *par)
 		0x534 * FB_BACKLIGHT_MAX / MAX_LEVEL);
 
 	bd->props.max_brightness = FB_BACKLIGHT_LEVELS - 1;
-	bd->props.brightness = nvidia_bl_data.max_brightness;
+	bd->props.brightness = bd->props.max_brightness;
 	bd->props.power = FB_BLANK_UNBLANK;
 	backlight_update_status(bd);