auxdisplay: ht16k33: Remove struct backlight_ops.check_fb

The driver sets struct fb_info.bl_dev to the correct backlight
device. Thus rely on the backlight core code to match backlight
and framebuffer devices, and remove the extra check_fb() function
from struct backlight_ops.

v3:
	* use 'check_fb()' in commit message (Andy)

Signed-off-by: Thomas Zimmermann <[email protected]>
Cc: Robin van der Gracht <[email protected]>
Acked-by: Robin van der Gracht <[email protected]>
Acked-by: Andy Shevchenko <[email protected]>
Reviewed-by: Javier Martinez Canillas <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Lee Jones <[email protected]>

Author: Thomas Zimmermann

drivers/auxdisplay/ht16k33.c

@@ -295,16 +295,8 @@ static int ht16k33_bl_update_status(struct backlight_device *bl)
 	return ht16k33_brightness_set(priv, brightness);
 }
 
-static int ht16k33_bl_check_fb(struct backlight_device *bl, struct fb_info *fi)
-{
-	struct ht16k33_priv *priv = bl_get_data(bl);
-
-	return (fi == NULL) || (fi->par == priv);
-}
-
 static const struct backlight_ops ht16k33_bl_ops = {
 	.update_status	= ht16k33_bl_update_status,
-	.check_fb	= ht16k33_bl_check_fb,
 };
 
 /*