ext4: free orphan info with kvfree

Orphan info is now getting allocated with kvmalloc_array(). Free it with
kvfree() instead of kfree() to avoid complaints from mm.

Reported-by: Chris Mason <clm@meta.com>
Fixes: 0a6ce20c ("ext4: verify orphan file size is not too big")
Cc: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Message-ID: <20251007134936.7291-2-jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>