ch_ktls: lock is not freed

Currently lock gets freed only if timeout expires, but missed a
case when HW returns failure and goes for cleanup.

Fixes: efca3878

 ("ch_ktls: Issue if connection offload fails")
Signed-off-by: Rohit Maheshwari <rohitm@chelsio.com>
Link: https://lore.kernel.org/r/20201125072626.10861-1-rohitm@chelsio.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>