dapl: avoid accessing cm_ptr after queuing to cr_thread

It's possible that once a cm_ptr has been added to the hca list, that the
cr_thread can remove it from the list and process it or delete it.  To avoid
any potential issue, do not reference the cm_ptr after placing it on the hca list.

Signed-off-by: Sean Hefty <sean.hefty@intel.com>