media: i2c: st-mipid02: Use %pe format specifier

The %pe format specifier is designed to print error pointers. It prints
a symbolic error name (eg. -EINVAL) and it makes the code simpler by
omitting PTR_ERR().

This patch fixes this cocci report:
./i2c/st-mipid02.c:751:3-10: WARNING: Consider using %pe to print PTR_ERR()

Signed-off-by: Ricardo Ribalda <[e-mail]>
Acked-by: Sakari Ailus <[e-mail]>
Signed-off-by: Hans Verkuil <[e-mail]>

drivers/media/i2c/st-mipid02.c

···
 	of_node_put(ep_node);
 
 	if (IS_ERR(asd)) {
-		dev_err(&client->dev, "fail to register asd to notifier %ld",
-			PTR_ERR(asd));
+		dev_err(&client->dev, "fail to register asd to notifier %pe",
+			asd);
 		return PTR_ERR(asd);
 	}
 	bridge->notifier.ops = &mipid02_notifier_ops;