splice: fsnotify_access(in), fsnotify_modify(out) on success in tee

Same logic applies here: this can fill up the pipe, and pollers that rely
on getting IN_MODIFY notifications never wake up.

Fixes: 983652c69199 ("splice: report related fsnotify events")
Link: https://lore.kernel.org/linux-fsdevel/jbyihkyk5dtaohdwjyivambb2gffyjs3dodpofafnkkunxq7bu@jngkdxx65pux/t/#u
Link: https://bugs.debian.org/1039488
Signed-off-by: Ahelenia Ziemiańska <[e-mail]>
Acked-by: Jan Kara <[e-mail]>
Reviewed-by: Amir Goldstein <[e-mail]>
Message-Id: <10d76d[e-mail]>
Signed-off-by: Christian Brauner <[e-mail]>

fs/splice.c

···
 		}
 	}
 
+	if (ret > 0) {
+		fsnotify_access(in);
+		fsnotify_modify(out);
+	}
+
 	return ret;
 }