fs: dlm: move state change into else branch

Currently we can switch at first into DLM_CLOSE_WAIT state and then do
another state change if a condition is true. Instead of doing two state
changes we handle the other state change inside an else branch of this
condition.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>