CIFS: Fix missing nls unload in smb2_reconnect()

commit 4772c79599564bd08ee6682715a7d3516f67433f upstream.

Acked-by: Sachin Prabhu <sprabhu@redhat.com>
Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Corey Edwards <ensabahnur16@gmail.com>