call chtls_free_uld() only for the initialized cdev,
this fixes NULL dereference in chtls_free_uld()
Signed-off-by: NGanesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: NAtul Gupta <atul.gupta@chelsio.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>